Anatomical Entity List
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Ontology ID Name Parent Term Description Action
PO:0000001 plant embryo proper PO:0025099 An embryonic plant structure (PO:0025099) that is the body of a developing plant embryo (PO:0009009) attached to the maternal tissue in an plant ovule (PO:0020003) by a suspensor (PO:0020108).
PO:0000002 anther wall PO:0025307 A microsporangium wall (PO:0025307) that is part of an anther (PO:0009066).
PO:0000003 whole plant PO:0009011 A plant structure (PO:0005679) which is a whole organism.
PO:0000004 in vitro plant structure PO:0009011 A plant structure (PO:0009011) that is grown or maintained in vitro.
PO:0000005 cultured plant cell PO:0000004 A plant cell (PO:0009002) that is grown or maintained in vitro.
PO:0000006 plant protoplast PO:0000005 A cultured plant cell from which the entire plant cell wall has been removed.
PO:0000007 leaf-derived cultured plant cell PO:0000005 A cultured plant cell that was derived from leaf tissue.
PO:0000008 root-derived cultured plant cell PO:0000005 A cultured plant cell that was derived from root tissue.
PO:0000009 cultured plant callus PO:0000004 A plant callus (PO:0005052) grown or maintained in vitro.
PO:0000010 cultured plant embryo PO:0000004 A plant embryo (PO:0009009) that is grown or maintained in vitro.
PO:0000011 cultured somatic plant embryo PO:0000010 A somatic plant embryo grown and maintained in vitro.
PO:0000012 apical hook PO:0025001 Hook-like structure which develops at the apical part of the hypocotyl in dark-grown seedlings in dicots.
PO:0000013 cauline leaf PO:0009025 A vascular leaf (PO:0009025), borne on the stem (PO:0009047).
PO:0000014 rosette leaf PO:0009025 A vascular leaf (PO:0009025) born in a circular pattern around a stem (PO:0009047) with compressed stem internodes (PO:0020142).
PO:0000015 cotyledon primordium PO:0025128 A phyllome primordium (PO:0025128) that develops from a cotyledon anlagen (PO:0025432) and is part of a vegetative shoot apex (PO:0025223) and is committed to the development of a cotyledon (PO:0020030).
PO:0000016 lateral root primordium PO:0005029 A root primordium (PO:0005029) that is part of a root (PO:0009005) and is committed to the development of a lateral root (PO:0020121).
PO:0000017 vascular leaf primordium PO:0025128 A phyllome primordium (PO:0025128) that develops from a vascular leaf anlagen (PO:0025431) and is part of a vegetative shoot apex (PO:0025223) and is committed to the development of a vascular leaf (PO:0009025).
PO:0000018 ovule primordium PO:0025477 A floral structure primordium (PO:0025477) that is committed to the development of an ovule (PO:0020003).
PO:0000019 gynoecium primordium PO:0025477 A floral structure primordium (PO:0025477) that is committed to the development of a gynoecium (PO:0009062).
PO:0000021 petal primordium PO:0025128 A phyllome primordium (PO:0025128) that develops from a petal anlagen (PO:0025484) and is committed to the development of a petal (PO:0009032).
PO:0000025 root tip PO:0025001 A cardinal organ part (PO:0025001) which is the apical portion of the root (PO:0009005), and includes the root apical meristem (PO:0020147) and root cap (PO:0020123).
PO:0000026 primary root tip PO:0000025 The portion of the primary root including the meristem and root cap.
PO:0000027 lateral root tip PO:0000025 A root tip (PO:0000025) of a lateral root (PO:0020121).
PO:0000030 septum PO:0025269 A collective organ part structure composed of two or more layers of various tissues that is a partition that divides a cavity formed by the fusion of two or more organs.
PO:0000031 lenticel PO:0005046 A portion of periderm tissue (PO:0005046) characterized by the presence of intercellular spaces between the cells of the phellem (PO:0004003) and phelloderm (PO:0005050)
PO:0000032 tetrad of microspores PO:0009007 A portion of plant tissue consisting of four microspores that remained joined together shortly after meiosis. Each cell will give rise to a male gametophyte.
PO:0000033 fruit valve PO:0025228 A valve that is a part of a fruit that splits apart when the fruit dehisces.
PO:0000034 vascular system PO:0009015 A maximal portion of vascular tissue (PO:0009015) in a whole plant (PO:0000003), collective plant structure (PO:0025497), multi-tissue plant structure (PO:0025496), or cardinal part of multi-tissue plant structure (PO:0025498).
PO:0000035 cotyledon vascular system PO:0000034 A vascular system (PO:0000034) that is part of a cotyledon (PO:0020030).
PO:0000036 leaf vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in a vascular leaf (PO:0009025).
PO:0000037 shoot axis apex PO:0025029 A shoot axis (PO:0025029) that is the most distal part of a shoot system (PO:0009006) and has as parts a shoot apical meristem (PO:0020148) and the youngest primordia (PO:0025127).
PO:0000038 primary endosperm cell PO:0025026 Cell produced by the fusion of sperm cell nucleus and two polar nuclei of the central cell (or diploid secondary endosperm nucleus, in cases where two polar nuclei fuse together before double fertilization). The first cell of the endosperm, often triploid.
PO:0000039 shoot axis vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue in their specific arrangement in a shoot axis (PO:0025029).
PO:0000040 adventitious root nodule PO:0003023 Enlargement or swelling at position of dormant adventitious root primordium (on the stem), inhabited by nitrogen-fixing bacteria.
PO:0000041 epidermal cork cell PO:0004718 One of the two types of short cells in the epidermis of grasses and bamboos. It is usually paired with silica cell.
PO:0000042 shoot-borne root PO:0009005 A root (PO:0009005) that develops from shoot axis (PO:0025029) tissue.
PO:0000043 crown root PO:0003005 A shoot-borne nodal root (PO:0003005) formed at a stem base (PO:0008039).
PO:0000044 prop root PO:0003005 A shoot-borne nodal root (PO:0003005) formed at a stem node (PO:0020141) above the ground and growing directly into the soil.
PO:0000045 embryo root PO:0009005 A root (PO:0009005) that is initiated in a developing plant embryo (PO:0009009).
PO:0000046 seminal root PO:0000045 An embryo root (PO:0000045) formed within the scutellar node (PO:0004708) of the plant embryo (PO:0009009) in some monocotyledonous plants.
PO:0000047 leaf lamina epidermis PO:0006016 A portion of leaf epidermis that is part of a leaf lamina.
PO:0000048 leaf lamina vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue in their specific arrangement in a leaf lamina (PO:0020039).
PO:0000049 leaf lamina abaxial epidermis PO:0000047 A portion of leaf lamina epidermis that covers the abaxial/lower surface of a leaf lamina.
PO:0000050 leaf lamina adaxial epidermis PO:0000047 A portion of leaf lamina epidermis that covers the adaxial/upper surface of a leaf lamina.
PO:0000051 petiole epidermis PO:0006016 A portion of leaf epidermis that is part of a petiole.
PO:0000052 petiole vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue in their specific arrangement in a petiole (PO:0020038).
PO:0000053 petiole cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a petiole (PO:0020038).
PO:0000054 petal vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in a petal (PO:0025218).
PO:0000055 bud PO:0009006 An undeveloped shoot system (PO:0009006).
PO:0000056 flower bud PO:0025084 A bud that develops into a flower.
PO:0000057 inflorescence bud PO:0025084 A bud that develops into an inflorescence.
PO:0000058 vegetative bud PO:0000055 A bud (PO:0000055) that develops into a vegetative shoot system (PO:0025607).
PO:0000059 root initial cell PO:0004011 An initial cell that is part of a root apical meristem and by division gives rise to two cells, one of which remains in the meristem, while the other is produces different root cells.
PO:0000060 root cortex-endodermis initial cell PO:0000059 A root initial cell that produces root cortex and endodermis. In direct contact with quiescent center.
PO:0000061 lateral root-cap epidermal initial cell PO:0000059 A root initial cell that produces lateral root-cap cells and root epidermis.
PO:0000062 stomatal initial cell PO:0000349 An epidermal initial cell (PO:0000349) that undergoes several rounds of uneven division, each time giving rise to a larger daughter cell that differentiates into an epidermal ground cell and a smaller daughter cell that remains meristematic, until the meristematic cell (PO:0004010) differentiates into a guard mother cell (PO:0000351).
PO:0000063 leaf procambial cell PO:0025258 A procambial cell (PO:0025258) that is part of a leaf procambium (PO:0025259).
PO:0000064 xylem pole pericycle cell PO:0025261 A pericycle cell that is adjacent to the protoxylem of a vascular bundle.
PO:0000065 phloem pole pericycle cell PO:0025261 A pericycle cell that is adjacent to the protophloem of a vascular bundle.
PO:0000066 epithem cell PO:0000074 A parenchyma cell of the mesophyll of a hydathode found between the xylem endings and the epidermis.
PO:0000067 proteoid root PO:0009005 A root (PO:0009005) that forms one or more clusters of closely spaced lateral roots (PO:0020121) of limited growth along its length.
PO:0000071 companion cell PO:0000074 A parenchyma cell (PO:0000074) that is adjacent to a sieve tube element (PO:0000289) and arises from the same phloem mother cell (PO:0000400) as the sieve tube element.
PO:0000074 parenchyma cell PO:0025030 A relatively unspecialized ground tissue cell with a nucleate protoplast.
PO:0000075 collenchyma cell PO:0025030 An elongated plant cell with unevenly thickened non-lignified primary walls that is alive at maturity.
PO:0000076 chlorenchyma cell PO:0000074 A parenchyma cell containing chloroplasts; a component of leaf mesophyll and other green parenchyma tissue.
PO:0000077 sclerenchyma cell PO:0025030 A ground tissue cell (PO:0025030) with a lignified secondary cell wall.
PO:0000078 transfer cell PO:0025030 A cell with wall ingrowths (or invaginations) that increase the surface of the plasmalemma.
PO:0000079 fusiform initial cell PO:0000295 An elongated cambial initial cell (PO:0000295) with approximately wedge-shaped ends that is part of the vascular cambium (PO:0005598) and gives rise to axial cells.
PO:0000082 ray initial cell PO:0000295 A cambial initial cell (PO:0000295) that gives rise to ray cells of the secondary xylem (PO:0005848) and secondary phloem (PO:0005043).
PO:0000084 plant sperm cell PO:0025006 A gamete (PO:0025006) produced by an antheridium (PO:0025125) or a microgametophyte (PO:0025280).
PO:0000112 shoot axis epidermis PO:0006035 A portion of shoot system epidermis (PO:0006035) that is part of a shoot axis (PO:0025029).
PO:0000115 socket cell PO:0025165 A shoot epidermal cell (PO:0025165) that surrounds a trichome (PO:0000282) and provides its support.
PO:0000146 abscission zone PO:0009007 A portion of plant tissue (PO:0009007) that has as part a separation layer (PO:0006211) and a protective layer (PO:0006212), and is involved in the abscission (GO:0009838) of a fruit (PO:0009001), flower (PO:0009046), leaf (PO:0025034) or other plant structure (PO:0009011).
PO:0000191 synergid PO:0025026 Cell, usually two in number, in the micropylar end of the embryo sac of angiosperms associated with the egg in the egg apparatus.
PO:0000198 free nuclear endosperm PO:0009089 A portion of endosperm (PO:0009089) tissue in which at least the first karyokinesis is not followed by cytokinesis.
PO:0000199 cellular endosperm PO:0009089 A portion of endosperm (PO:0009089) in which the first karyokinesis event is accompanied by cytokinesis.
PO:0000200 micropylar endosperm PO:0009007 A portion of plant tissue (PO:0009007) that is the region of the endosperm closest to the micropyle of the seed.
PO:0000201 chalazal cyst PO:0009007 A portion of plant tissue (PO:0009007) that is the part of the endosperm (PO:0009089) nearest the chalazal region of the plant ovule (PO:0020003) and forming a cyst-like structure.
PO:0000207 nectary epidermis PO:0006035 A portion of shoot system epidermis (PO:0006035) that is part of a nectary (PO:0009035) .
PO:0000223 shoot axis cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a shoot axis (PO:0025029).
PO:0000224 central zone PO:0009013 An area of densely packed cells in the shoot apex that divide infrequently.
PO:0000225 peripheral zone PO:0009013 A portion of meristem tissue (PO:0009013) which is the organogenic region of the meristem, characterized by higher rates of cell division.
PO:0000226 rib zone PO:0009013 The region of the shoot apical meristem that lies below the central zone and is flanked by the peripheral zone.
PO:0000229 flower meristem PO:0008028 A portion of reproductive shoot apical meristem tissue (PO:0008028) that gives rise to the floral organs (PO:0025395).
PO:0000230 inflorescence meristem PO:0009013 A meristem that gives rise to an inflorescence.
PO:0000232 axillary bud meristem PO:0006079 A shoot system meristem (PO:0006079) formed in an axil (PO:0025224).
PO:0000244 functional megaspore PO:0020019 A megaspore(s) that forms an embryo sac.
PO:0000245 degenerate megaspore PO:0020019 In monosporic and bisporic megasporogenesis: the megaspore(s) that would not participate in megagametogenesis.
PO:0000252 endodermis PO:0025059 A portion of ground tissue (PO:0025059) that is the inner most layer of a cortex (PO:0005708) and has a casparian strip in its anticlinal cell walls.
PO:0000256 root hair cell PO:0025164 A root epidermal cell (PO:0025164) that develops from a trichoblast (PO:0000262) and has as part a root hair (GO:0035618).
PO:0000258 root cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a root (PO:0009005).
PO:0000262 trichoblast PO:0025164 A root epidermal cell that is the smaller cell produced by the asymmetric division of an epidermal intial and gives rise to a root hair.
PO:0000263 non-hair root epidermal cell PO:0025164 A root epidermal cell (PO:0025164) that develops from an epidermal initial (PO:0000349) and does not have as part a root hair (GO:0035618).
PO:0000272 protoxylem PO:0005849 A portion of primary xylem (PO:0000272) tissue that has as part one or more protoxylem tracheary elements (PO:0025575) embedded in parenchyma (PO:0005421) tissue.
PO:0000274 xylem fiber cell PO:0025407 A fiber cell (PO:0025407) that is part of a portion of xylem (PO:0005352) tissue.
PO:0000282 trichome PO:0009011 A unicellular or multicellular plant structure (PO:0009011) that forms a non-sclerified outgrowth from the epidermis (PO:0005679).
PO:0000283 idioblast PO:0025606 A native plant cell (PO:0025606) that markedly differs in form, size, or contents from other cells in the same tissue.
PO:0000284 subsidiary cell PO:0025165 An epidermal cell associated with a stoma and at least morphologically distinguishable from the other epidermal cells.
PO:0000289 sieve tube element PO:0025406 A sieve element (PO:0025406) that is part of a sieve tube (PO:0025416) and has as parts sieve areas aggregated into sieve plates (GO:0097218).
PO:0000290 tracheary element PO:0025606 A native plant cell (PO:0025606) that has a lignified cell wall with secondary thickening and bordered pits.
PO:0000293 guard cell PO:0025165 One of a pair of cells flanking the stomatal pore.
PO:0000295 cambial initial cell PO:0004011 An initial cell (PO:0004011) that is part of the vascular cambium (PO:0005598) or cork cambium (PO:0005599), and by periclinal divisions, produces cells to the outside or inside of the cambial axis.
PO:0000301 tracheid PO:0000290 A tracheary element (PO:0000290) that has no perforations in its cell wall.
PO:0000309 nectary parenchyma PO:0009035 A portion of parenchyma tissue (PO:0005421) that is part of a nectary (PO:0009035).
PO:0000332 epidermal pavement cell PO:0025165 A shoot epidermal cell that is relatively unspecialized at maturity.
PO:0000349 epidermal initial cell PO:0004011 An initial cell (PO:0004011) that is part of an epidermis (PO:0005679) and gives rise to specialized cell types of the epidermis.
PO:0000351 guard mother cell PO:0025165 A shoot epidermal cell that divides to produce the guard cells.
PO:0000352 myrosin cell PO:0025030 A cell containing glucosinolates (\mustard oil glucosides\) and myrosinases, enzymes hydrolyzing the glucosinolates.
PO:0000353 passage cell PO:0025030 A ground tissue cell that is part of an exodermis or an endodermis and remains thin walled when the associated cells develop thick secondary walls.
PO:0000355 fiber tracheid PO:0000274 A xylem fiber cell (PO:0000274) with bordered pits with pit cavities.
PO:0000372 metaxylem PO:0005849 A portion of primary xylem (PO:0005849) tissue that has as part one or more metaxylem tracheary elements (PO:0025576) embedded in parenchyma (PO:0005421) tissue and may contain xylem fiber cells (PO:0000274).
PO:0000400 phloem mother cell PO:0000295 A cambial initial cell (PO:0000295) which is destined to differentiate into secondary phloem.
PO:0000423 plant zygote PO:0025606 A native plant cell (PO:0025606) which is a whole plant (PO:0000003) in the plant zygote stage (PO:0001097).
PO:0000431 megasporocyte PO:0006204 A sporocyte (PO:0006204) that produces four haploid (1n) megaspores (PO:0020019).
PO:0002000 stomatal complex PO:0006035 A portion of shoot system epidermis (PO:0006035) that has as parts two guard cells (PO:0000293) and a stomatal pore (PO:0008032). May also contain subsidiary cells (PO:0000284).
PO:0002002 embryo basal cell PO:0025028 A native plant cell (PO:0025606) that is the lower-most cell formed after the first division of the plant zygote (PO:0000423) and is part of a plant embryo (PO:0009009).
PO:0002003 xylem vessel member PO:0000290 A tracheary element (PO:0000290) that is part of a xylem vessel (PO:0025417) and has as parts perforation plates.
PO:0002004 silk scar PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) which is composed of the shriveled remains of the silk (PO:0006488), and the base of the style (PO:0009074), and is located on the distal end of a developing or mature kernel (caryopsis fruit; PO:0030104).
PO:0003000 transition zone PO:0025001 A region of the root between the meristem and the region of rapid elongation in which isodiametric growth (cell expansion) occurs.
PO:0003005 shoot-borne nodal root PO:0000042 A shoot-borne root (PO:0000042) that forms at a shoot axis node (PO:0005004).
PO:0003011 root vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue in their specific arrangement in a root (PO:0009005).
PO:0003015 primary root differentiation zone PO:0020135 A root differentiation zone that is part of a primary root.
PO:0003016 lateral root differentiation zone PO:0020135 A root differentiation zone that is part of a lateral root.
PO:0003017 root cap of primary root PO:0020123 A root cap that is part of a primary root tip.
PO:0003018 root cap of lateral root PO:0020123 A root cap that is part of a lateral root tip.
PO:0003019 central root cap of lateral root PO:0020130 A central root cap that is part of a root cap of lateral root.
PO:0003020 lateral root cap of lateral root PO:0020131 A lateral root cap that is part of a root cap of lateral root.
PO:0003021 central root cap of primary root PO:0020130 A central root cap that is part of a root cap of primary root.
PO:0003022 lateral root cap of primary root PO:0020131 A lateral root cap (PO:0020131) that is part of a root cap (PO:0020123) of a primary root (PO:0020127).
PO:0003023 root nodule PO:0025001 A cardinal organ part (PO:0025001) that is an outgrowth of a root (PO:0009005) and is inhabited by nitrogen-fixing bacteria.
PO:0003024 stolon PO:0025073 A branch (PO:0025073) that is prostrate or trailing, and produces adventitious nodal roots (PO:0003005) and sometimes erect shoots.
PO:0004001 bulliform cell PO:0025212 An enlarged more or less thin-walled leaf pavement cell, present, with other similar cells, in longitudinal rows in leaves of monocots.
PO:0004003 phellem PO:0025059 A portion of ground tissue (PO:0025059) centrifugally derived from cork cambium (PO:0005599), non-living at maturity, and having suberized walls.
PO:0004006 mesophyll cell PO:0000076 A chlorenchyma cell that is part of a mesophyll.
PO:0004009 silica cell PO:0004718 Cells with deposits of silica in them. One of the two types of short cells in the epidermis of grasses and bamboos. It is usually paired with epidermal cork cell.
PO:0004010 meristematic cell PO:0025606 A native plant cell (PO:0025606) synthesizing protoplasm and producing new cells by division and with only a primary cell wall.
PO:0004011 initial cell PO:0004010 A meristematic cell (PO:0004010) that by division gives rise to two cells, one of which remains meristematic, while the other is added to the plant body.
PO:0004013 epidermal cell PO:0025606 A native plant cell (PO:0025606) that is part of a portion of epidermis (PO:0005679).
PO:0004509 glandular trichome PO:0000282 A trichome (PO:0000282) that secretes or sequesters a portion of plant substance (PO:0025161).
PO:0004511 seed trichome PO:0000282 A trichome that develops from seed coat epidermis.
PO:0004512 heartwood PO:0005848 A portion of secondary xylem (PO:0005848) that lacks living secondary xylem parenchyma cells (PO:0004525).
PO:0004513 sapwood PO:0005848 A portion of secondary xylem (PO:0005848) that has as parts living secondary xylem parenchyma cells (PO:0004525).
PO:0004514 growth ring PO:0005848 A portion of secondary xylem (PO:0005848) that has as parts a single layer of early wood (PO:0004515) and a single layer of late wood (PO:0004516) from the same growth season and is part of a shoot axis (PO:0025029) or root (PO:0009005).
PO:0004515 early wood PO:0005848 A portion of secondary xylem (PO:0005848) that is a part of a growth ring (PO:0004514) formed during the early part of a growing season, has lower density than late wood (PO:0004516) of the same growth ring, and has as parts early wood tracheary elements (PO:0025461) with generally larger lumens than the late wood tracheary elements (PO:0025462) of the same growth ring.
PO:0004516 late wood PO:0005848 A portion of secondary xylem (PO:0005848) that is a part of a growth ring (PO:0004514) formed during the later part of a growing season, has higher density than early wood (PO:0004515) of the same growth ring, and has as parts late wood tracheary elements (PO:0025462) with generally smaller lumens than the early wood tracheary elements (PO:0025461) of the same growth ring.
PO:0004517 growth ring boundary PO:0005848 A portion of secondary xylem (PO:0005848) that includes the last-formed late wood (PO:0004516) of one growth ring (PO:0004514) and the earliest-formed early wood (PO:0004515) of the next growth ring.
PO:0004518 bark PO:0009007 A portion of plant tissue (PO:0009007) outside the vascular cambium (PO:0005598) or the xylem (PO:0005352); in older trees may be divided into dead outer bark and living inner bark, which consists of secondary phloem (PO:0005043).
PO:0004519 phloem fiber cell PO:0025407 A fiber cell (PO:0025407) that is part of a portion of phloem (PO:0005417) tissue.
PO:0004520 libriform fiber cell PO:0000274 A xylem fiber cell (PO:0000274) with simple pits.
PO:0004521 septate fiber cell PO:0025407 A plant fiber cell (PO:0025407) with thin transverse walls (septa), which are formed when mitosis occurs within the cell after development of a secondary cell wall (GO:0009531).
PO:0004522 outer vascular cambium PO:0005598 Cambium at the outer margin of the xylem cylinder.
PO:0004523 included vascular cambium PO:0005598 Cambium occurring within xylem.
PO:0004524 included phloem PO:0005043 A portion of secondary phloem tissue produced by included vascular cambium.
PO:0004525 secondary xylem parenchyma cell PO:0000074 A parenchyma cell (PO:0000074) that is part of a portion of secondary xylem parenchyma (PO:0004532).
PO:0004526 axial secondary xylem parenchyma cell PO:0004525 A secondary xylem parenchyma cell (PO:0004525) that is part of a portion of axial secondary xylem parenchyma (PO:0004533).
PO:0004527 ray secondary xylem parenchyma cell PO:0004525 A parenchyma cell (PO:0000074) that develops from a ray initial (PO:0000082) and is part of a portion of ray secondary xylem parenchyma (PO:0004534).
PO:0004528 upright ray secondary xylem parenchyma cell PO:0004527 A ray secondary xylem parenchyma cell (PO:0004527) that is oriented with its longest dimension parallel to the plant axis (PO:0025004) in which it is found.
PO:0004529 procumbent ray secondary xylem parenchyma cell PO:0004527 A ray secondary xylem parenchyma cell (PO:0004527) that is oriented with its longest dimension radial to the plant axis (PO:0025004) in which it is found.
PO:0004530 tile cell PO:0004528 Empty upright ray cell of approximately the same height as the procumbent ray cell and occurring in indeterminate horizontal series usually interspersed among the procumbent cells.
PO:0004531 sheath cell PO:0004528 Cell on the margin of, and tending to form a sheath around, the procumbent cells of a multi-seriate ray as seen in tangential section.
PO:0004532 secondary xylem parenchyma PO:0005421 A portion of parenchyma (PO:0005421) tissue that is part of a portion of secondary xylem (PO:0005848) and has as parts secondary xylem parenchyma cells (PO:0004525).
PO:0004533 axial secondary xylem parenchyma PO:0004532 A portion of secondary xylem parenchyma (PO:0004532) that is part of an axial system (PO:0025410) and has as parts axial secondary xylem parenchyma cells (PO:0004526).
PO:0004534 ray secondary xylem parenchyma PO:0004532 A portion of secondary xylem parenchyma (PO:0004532) that is part of a ray system (PO:0025411) and has as parts ray secondary xylem parenchyma cells (PO:0004527).
PO:0004535 fruit placenta PO:0020001 A portion of placenta tissue (PO:0025078) that is part of a fruit (PO:0009001) and to which seeds (PO:0009010) are attached.
PO:0004536 infructescence fruit pedicel PO:0030114 A fruit pedicel (PO:0030114) that bears a fruit (PO:0009001) in an infructescence (PO:0006342).
PO:0004537 nucellar plant embryo PO:0025302 A somatic plant embryo derived directly from nucellus cells.
PO:0004538 indeterminate nodule PO:0003023 A root nodule characterized by a persistent meristem, presence of vascular transfer cells, and cell division in the inner cortex with non-dividing infected cells and bacteria.
PO:0004539 determinate nodule PO:0003023 A root nodule characterized by a dividing infected cells and bacteria, vascular transfer cells absent and cell division is in the outer cortex.
PO:0004540 fruit columella PO:0025230 A columella (PO:0025230) that forms the central axis of a fruit.
PO:0004542 rhizome PO:0025029 A swollen shoot axis (PO:0025029) that grows horizontally at or below the substrate surface and produces shoots above and roots or rhizoids below.
PO:0004543 shoot axis tuber PO:0025029 A shoot axis (PO:0025029) that develops from a branch (PO:0025073) and is radially enlarged for storage.
PO:0004544 root-borne shoot system PO:0009006 A shoot system that is initiated from a root.
PO:0004545 shoot-borne shoot system PO:0009006 A shoot system that is initiated from a shoot.
PO:0004546 epicormic shoot system PO:0004545 A shoot-borne shoot system (PO:0004546) developing from a stem (PO:0009047).
PO:0004547 subterranean shoot axis tuber PO:0004543 A shoot axis tuber (PO:0004543) that develops below ground.
PO:0004548 aerial tuber PO:0004543 A shoot axis tuber (PO:0004543) that develops above ground.
PO:0004700 anther wall middle layer PO:0025059 A portion of ground tissue (PO:0025059) directly internal to an anther wall endothecium (PO:0020002) that develops from an anther wall secondary parietal cell layer (PO:0006007).
PO:0004701 short shoot PO:0006343 Shoot system in which the internodes elongate little or at all, bearing reproductive structures and/or leaves.
PO:0004702 long shoot PO:0006343 Shoot system in which all or most of the internodes elongate.
PO:0004703 carpel primordium PO:0025128 A phyllome primordium (PO:0025128) that develops from a carpel anlagen (PO:0006005) and is committed to the development of a carpel (PO:0009030).
PO:0004704 sepal primordium PO:0025128 A phyllome primordium (PO:0025128) that develops from a sepal anlagen (PO:0025485) and is committed to the development of a sepal (PO:0009031).
PO:0004705 stamen primordium PO:0025128 A phyllome primordium (PO:0025128) that develops from a stamen anlagen (PO:0025486) and is committed to the development of a stamen (PO:0009029).
PO:0004707 fruit dehiscence zone PO:0025092 A dehiscence zone (PO:0025092) that is part of a fruit.
PO:0004708 scutellar node PO:0020141 A stem node (PO:0020141) that is part of a plant embryo axis (PO:0019018) where the scutellum (PO:0020110) is attached.
PO:0004709 axillary bud PO:0000055 A bud (PO:0000055) that develops from an axillary bud meristem (PO:0000232).
PO:0004710 axillary flower bud PO:0000056 An axillary bud that develops into a flower.
PO:0004711 axillary inflorescence bud PO:0000057 An axillary reproductive bud that develops into an inflorescence.
PO:0004712 axillary vegetative bud PO:0000058 An axillary bud (PO:0004712) that develops into a shoot system (PO:0009006) that has as organ parts only vegetative organs.
PO:0004713 terminal bud PO:0000055 A bud that develops from a shoot apical meristem.
PO:0004714 terminal flower bud PO:0000056 A terminal bud that develops into a flower.
PO:0004715 terminal inflorescence bud PO:0000057 A terminal reproductive bud develops into an inflorescence.
PO:0004716 terminal vegetative bud PO:0000058 A terminal bud (PO:0004713) that develops into a shoot system (PO:0009006) that has as organ parts only vegetative organs.
PO:0004717 long cell PO:0025212 A more or less rectangular leaf pavement cell in which the proximodistal dimension is several times longer than the transverse dimension.
PO:0004718 short cell PO:0025212 An isodiametric leaf pavement cell.
PO:0004721 paraclade cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a higher order inflorescence axis (PO:0009081), also called a paraclade.
PO:0004722 pedicel cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a pedicel (PO:0030112).
PO:0004723 sepal vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in a sepal (PO:0009031).
PO:0004724 hypocotyl-root junction PO:0025001 A cardinal organ part (PO:0025001) that is the part of a plant axis (PO:0025004) where a radicle (PO:0020031) joins a hypocotyl (PO:0020100).
PO:0004725 vascular leaf primordium abaxial side PO:0025128 A portion of vascular leaf primordium (PO:0000017) that is distal to the axis of the shoot apical meristem (PO:0020148) and develops into the abaxial side of the leaf lamina (PO:0020039).
PO:0004726 vascular leaf primordium adaxial side PO:0025128 A portion of vascular leaf primordium (PO:0000017) that is proximal to the axis of the shoot apical meristem (PO:0020148) and develops into the adaxial side of the leaf lamina (PO:0020039).
PO:0005001 basal axillary shoot system PO:0006343 An axillary shoot system (PO:0006343) that is part of a stem base (PO:0008039).
PO:0005002 cauline axillary shoot PO:0006343 An axillary branch that forms from a leaf above the very base of the shoot.
PO:0005003 shoot axis trichome PO:0000282 A trichome that is part of a shoot axis epidermis.
PO:0005004 shoot axis node PO:0025001 A cardinal organ part (PO:0025001) of a shoot axis (PO:0025029) where a bud (PO:0000055) may form and develop into a branch (PO:0025073), leaf (PO:0025034), flower (PO:0004541), inflorescence (PO:0009049) or nodal root (PO:0003005).
PO:0005005 shoot axis internode PO:0025001 A cardinal organ part (PO:0025001) of a shoot axis (PO:0025029) that is between two shoot axis nodes (PO:0005004).
PO:0005006 articulated laticifer PO:0005656 A portion of secretory tissue (PO:0005656) that has as parts articulated laticifer cells (PO:0006221).
PO:0005010 anther septum PO:0000030 A septum (PO:0000030) that is part of an anther dehiscence zone (PO:0005011).
PO:0005011 anther dehiscence zone PO:0025092 A dehiscence zone (PO:0025092) that is part of an anther (PO:0009066).
PO:0005012 pedicel vascular system PO:0000039 A shoot axis vascular system (PO:0000039) that includes the totality of the portions of vascular tissue in their specific arrangement in a pedicel (PO:0030112).
PO:0005013 hypocotyl epidermis PO:0025178 The outermost primary cell layer of the hypocotyl.
PO:0005014 embryo cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a plant embryo (PO:0009009).
PO:0005015 embryo endodermis PO:0000252 A portion of endodermis (PO:0000252) that is part of an plant embryo (PO:0009009).
PO:0005017 flower vascular system PO:0025205 A shoot system vascular system (PO:0025205) that includes the totality of the portions of vascular tissue in their specific arrangement in a flower (PO:0009046).
PO:0005018 stamen vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in a stamen (PO:0009029).
PO:0005019 carpel vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in a carpel (PO:0009030).
PO:0005020 vascular bundle PO:0009015 A portion of vascular tissue (PO:0009015) that is a unit strand of the vascular system (PO:0000034) and has as part xylem (PO:0005352) or phloem (PO:0005417).
PO:0005021 sepal margin PO:0025018 A phyllome margin (PO:0025018) which is part of a sepal (PO:0009031).
PO:0005022 plant ovary wall PO:0009007 A portion of plant tissue (PO:0009007) that is composed of plant ovary outer epidermis (PO:0005023), plant ovary inner epidermis (PO:0005024), and a plant ovary wall middle layer (PO:0005025)
PO:0005023 plant ovary outer epidermis PO:0006063 A portion of ovary epidermis (PO:0006063) which is the outer surface of a plant ovary (PO:0009072).
PO:0005024 plant ovary inner epidermis PO:0006063 A portion of ovary epidermis (PO:0006063) which is the inner surface of a plant ovary (PO:0009072).
PO:0005025 plant ovary wall middle layer PO:0005426 A portion of chlorenchyma tissue (PO:0005426) that is part of the plant ovary wall (PO:0005022) and is composed of mesophyll cells (PO:0004006).
PO:0005026 root giant cell PO:0025030 Multinucleate cell developed by a series of events involving kayokinesis but not cytokinesis of the initial feeding cell. The events are induced by root knot nematodes (e.g., Meloidogyne sp. ) entering the feeding cells (any cells) of the root vascular system.
PO:0005027 root syncytium cell PO:0025030 Multinucleate cell developed by a series of events involving fusion with the neighboring dividing cells. The events are induced by cyst nematodes (e.g. <i>Heterodera schachtii</i>) entering the feeding cells (any cells) of the root vascular system.
PO:0005028 inflorescence vascular system PO:0025205 A shoot system vascular system (PO:0025205) that includes the totality of the portions of vascular tissue in their specific arrangement in an inflorescence (PO:0009049).
PO:0005029 root primordium PO:0025127 A primordium (PO:0025127) that develops from a root anlagen (PO:0025433) and is committed to the development of a root (PO:0009005).
PO:0005030 lupulin gland PO:0004509 A glandular trichome (PO:0004509) that synthesizes terpenophenolic resins and prenylflavonoids.
PO:0005031 microsporangiate strobilus PO:0025083 A strobilus (PO:0025083) that bears only pollen (PO:0025281).
PO:0005032 megasporangiate strobilus PO:0025083 A strobilus (PO:0025083) that bears only plant ovules (PO:0020003).
PO:0005039 primary thickening meristem PO:0006344 A shoot lateral meristem (PO:0006344) that is part of a shoot axis (PO:0025029) and has a parts multiple layers of meristematic cells (PO:0004010) located near the shoot apical meristem (PO:0020148).
PO:0005040 root pith PO:0006109 A portion of pith (PO:0006109) that is part of a root stele (PO:0020124).
PO:0005041 shoot axis pith PO:0006109 A portion of pith (PO:0006109) that is part of a shoot axis (PO:0025029).
PO:0005043 secondary phloem PO:0005417 A portion of phloem (PO:0005417) tissue that develops from a vascular cambium (PO:0005598).
PO:0005046 periderm PO:0025059 A peripheral portion of ground tissue (PO:0025059) in a plant axis (PO:0025004) that is composed of cork cambium (phellogen; PO:0005599), phellem (PO:0004003), and phelloderm (PO:0005050).
PO:0005047 root periderm PO:0005046 A portion of periderm tissue (PO:0005046) that is part of a root (PO:0009005).
PO:0005048 shoot axis periderm PO:0005046 A portion of periderm tissue (PO:0005046) that is part of a shoot axis (PO:0025029).
PO:0005050 phelloderm PO:0025059 A portion of ground tissue (PO:0025059) often resembling cortical parenchyma produced centripetally by the cork cambium.
PO:0005051 hypodermis PO:0025059 A portion of ground tissue (PO:0025059) that is the outermost layer of a portion of cortex (PO:0005708).
PO:0005052 plant callus PO:0009007 A portion of plant tissue (PO:0009007) that consists of mass of undifferentiated plant cells (PO:0009002).
PO:0005057 shoot axis hypodermis PO:0005051 A portion of shoot axis hypodermis (PO:0005057) that is part of a stem cortex (PO:0000223).
PO:0005058 shoot axis endodermis PO:0000252 A portion of endodermis (PO:0000252) that is part of a shoot axis cortex (PO:0000223).
PO:0005059 root endodermis PO:0000252 A portion of endodermis that is part of a root cortex.
PO:0005060 leaf endodermis PO:0000252 A portion of endodermis that is part of a vascular leaf.
PO:0005352 xylem PO:0009015 A portion of vascular tissue (PO:0009015) that has as part one or more tracheary elements (PO:0000290).
PO:0005360 aleurone layer PO:0009007 A portion of plant tissue (PO:0009007) that is the outermost layer of endosperm (PO:0009089) in a seed (PO:0009010), its cells being characterized by presence of protein bodies (GO:0042735).
PO:0005415 endosperm parenchyma PO:0025067 A portion of seed storage parenchyma that is part of an endosperm.
PO:0005417 phloem PO:0009015 A portion of vascular tissue (PO:0009015) that has as parts sieve elements (PO:0025406).
PO:0005421 parenchyma PO:0025059 A portion of ground tissue (PO:0025059) composed of polyhedral cells typically with thin, non-lignified cellulosic cell walls and nucleate, living protoplasts.
PO:0005423 collenchyma PO:0025059 A portion of ground tissue (PO:0025059) which comprises living tissue composed of more or less elongated cells with thick, non-lignified primary cell walls.
PO:0005426 chlorenchyma PO:0005421 Chloroplast-containing parenchyma tissue.
PO:0005427 sclerenchyma PO:0025059 A portion of ground tissue (PO:0025059) which comprises supporting tissue composed of plant fiber cells (PO:0025407) or sclereid cells (PO:0025418).
PO:0005597 cambium PO:0020145 A lateral meristem (PO:0020145) that has as part a single layer of cambial initial cells (PO:0000295) and their derivatives, arranged orderly in radial files.
PO:0005598 vascular cambium PO:0005597 A cambium (PO:0005597) that is located between and gives rise to secondary xylem (PO:0005848) and secondary phloem (PO:0005043).
PO:0005599 cork cambium PO:0005597 A cambium (PO:0005597) that is part of a periderm (PO:0005046) and produces phellem (PO:0004003) and phelloderm (PO:0005050).
PO:0005645 leaf mesophyll PO:0006070 The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the foliage leaf.
PO:0005647 spongy mesophyll PO:0006070 Leaf mesophyll parenchyma characterized by little elongated cells, that are not closely packed and have conspicuous intercellular spaces.
PO:0005648 palisade mesophyll PO:0006070 Parenchyma containing closely packed elongated chlorenchymatous cells oriented perpendicular to the leaf surface and which are active in photosynthesis.
PO:0005656 portion of secretory tissue PO:0009007 A portion of plant tissue (PO:0009007) that form specialized structures producing a secretion.
PO:0005660 hydathode PO:0025001 A cardinal organ part that releases water through a hydathode pore.
PO:0005661 salt gland PO:0005656 A specialized tissue where excess salt absorbed in water from the soil is concentrated, being stores or excreted.
PO:0005669 oil gland PO:0005656 A gland or a cavity lined with cells that secrete oils.
PO:0005679 epidermis PO:0009007 A portion of plant tissue (PO:0009007) composed of epidermal cells (PO:0004013) that develops from the protoderm (PO:0006210) and covers the surface of a plant structure (PO:0009011).
PO:0005702 aerenchyma PO:0005421 A portion of parenchyma tissue containing particularly large intercellular spaces of schizogenous or lysigenous origin.
PO:0005708 cortex PO:0025059 A maximal portion of ground tissue (PO:0025059) between the vascular system (PO:0000034) and the epidermis (PO:0005679) in a plant.
PO:0005772 exodermis PO:0005051 The sub-epidermal layer or layers of cells of the root similar in structure and cytochemical characteristics of the endodermis, the outermost layer or layers of cells of the cortex.
PO:0005848 secondary xylem PO:0005352 A portion of xylem (PO:0005352) tissue that develops from a vascular cambium (PO:0005598).
PO:0005849 primary xylem PO:0005352 A portion of xylem (PO:0005352) tissue that develops from the procambium (PO:0025275).
PO:0006000 caryopsis hull PO:0025023 A collective phyllome structure that encloses a fruit of the Poaceae (caryopsis) and develops from a dried lemma and palea.
PO:0006001 phyllome PO:0009008 A lateral plant organ (PO:0009008) produced by a shoot apical meristem (PO:0020148).
PO:0006002 lower glume PO:0009039 A glume that is the proximal/basal of the two glumes subtending a pair of florets.
PO:0006003 scale leaf PO:0006001 A phyllome that is reduced in size relative to a vascular leaf on the same plant and is often associated with a perennating or dormant bud or a vegetatively propagating organ such as a rhizome.
PO:0006004 upper glume PO:0009039 A glume that is the apical/distal of the two glumes subtending a pair of florets.
PO:0006005 carpel anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a carpel primordium (PO:0004703) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
PO:0006006 anther wall primary parietal cell layer PO:0025059 A portion of ground tissue (PO:0025059) that is part of an anther wall (PO:0000002) and has as parts a primary parietal cell (PO:0006010) and adjacent plant cells.
PO:0006007 anther wall secondary parietal cell layer PO:0025059 A portion of ground tissue (PO:0025059) that is part of an anther wall (PO:0000002) and develops from an anther wall primary parietal cell layer (PO:0006006).
PO:0006008 anther wall inner secondary parietal cell layer PO:0006007 An anther wall secondary parietal cell layer (PO:0006007) that is formed towards the inside, after the cells of an anther wall primary parietal cell layer (PO:0006006) undergo a periclinal division.
PO:0006009 anther wall outer secondary parietal cell layer PO:0006007 An anther wall secondary parietal cell layer (PO:0006007) formed towards the outside, after an anther wall primary parietal cell layer (An anther wall secondary parietal cell layer (PO:0006006) undergoes a periclinal division.
PO:0006010 primary parietal cell PO:0025606 A native plant cell (PO:0025606) which is formed by the division of a male archesporial cell (PO:0006014), and is part of the anther wall primary parietal cell layer (PO:0006006).
PO:0006011 lateral leaf vein PO:0020140 An unbranched second order leaf vein (PO:0020140) that runs between two adjacent primary leaf veins (PO:0025413).
PO:0006012 leaf collar PO:0009013 A thin band of intercalary meristematic tissue at the junction of a leaf blade (lamina) and a leaf sheath found in grasses.
PO:0006013 juice sac tissue PO:0009007 A portion of plant tissue (PO:0009007) which is composed of highly vacuolated cells forming closely-packed, club-shaped sacs with long slender stalks and containing juice.
PO:0006014 male archesporial cell PO:0030056 An archesporial cell (PO:0030056) that is part of a microsporangium (PO:0025202) and divides to gives rise to a microsporocyte (PO:0020047).
PO:0006015 female archesporial cell PO:0030056 An archesporial cell (PO:0030056) that is part of a megasporangium (PO:0025201) and divides to give rise to a megasporocyte (PO:0000431).
PO:0006016 leaf epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a leaf (PO:0025034).
PO:0006017 helobial endosperm PO:0009089 A portion of endosperm (PO:0009089) tissue in which the first karyokinetic event is accompanied by the formation of a horizontal wall which divides the embryo sac central cell (PO:0020090) into unequal regions. The larger one is the micropylar chamber in which cytokinesis does not occur and the smaller one is the chalazal chamber.
PO:0006018 leaf adaxial epidermis PO:0006016 A portion of leaf epidermis (PO:0006016) that covers the adaxial/upper surface of a leaf.
PO:0006019 leaf abaxial epidermis PO:0006016 A portion of leaf epidermis (PO:0006016) that covers the abaxial/lower surface of a leaf.
PO:0006020 lateral root apical meristem PO:0020147 A root apical meristem (PO:0020147) that gives rise to a lateral root (PO:0020121).
PO:0006021 shoot-borne root apical meristem PO:0020147 A root apical meristem (PO:0020147) that gives rise to a shoot-borne root (PO:0000042).
PO:0006022 bundle sheath extension PO:0025059 A portion of ground tissue (PO:0025059) which forms a strip along the leaf veins and extending from the bundle sheath (PO:0006023) to the epidermis. It may be present on one or both sides of the vein and may consist of parenchyma or sclerenchyma.
PO:0006023 bundle sheath PO:0025059 A portion of ground tissue (PO:0025059) which comprises a layer or layers of cells surrounding the vascular bundles (PO:0005020) of leaves. It may consist of parenchyma (PO:0005421) or sclerenchyma (PO:0005427).
PO:0006024 parenchyma sheath PO:0006023 A single layered, parenchymatous bundle sheath characterized by presence of large quantity of starch.
PO:0006025 mestome sheath PO:0006023 The inner endodermal sheath of a two layered bundle sheath. The cells are smaller in diameter compared to those in outer wall (starch sheath). The cell walls are thick and contain suberized lamellae. They are analogous to endodermis.
PO:0006032 lemma awn PO:0025349 An awn that is part of a lemma.
PO:0006033 palea apiculus PO:0025001 A cardinal organ part (PO:0025001) which is a short, abrupt, flexible point at the apex of the palea (PO:0009038).
PO:0006034 leaflet margin PO:0025001 A cardinal organ part (PO:0025001) that is the edge of a leaflet (PO:0020049) and the area immediately internally adjacent to it.
PO:0006035 shoot system epidermis PO:0005679 A portion of epidermis (PO:0005679) that is part of a shoot system (PO:0009006) and arises from the meristem L1 layer (PO:0009020).
PO:0006036 root epidermis PO:0005679 A portion of epidermis (PO:0005679) that is part of a root (PO:0009005).
PO:0006039 shoot-borne root epidermis PO:0006036 A portion of root epidermis (PO:0006036) that is part of a shoot-borne root (PO:0000042).
PO:0006040 sepal epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a sepal (PO:0009031).
PO:0006041 petal epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a petal (PO:0009032).
PO:0006042 velamen PO:0006036 A multiseriate portion of root epidermis (PO:0006036) found in aerial roots of some monocots. Most of its cells are dead and store water like a sponge.
PO:0006043 integument epidermis PO:0005679 A portion of epidermis (PO:0005679) that is part of an integument (PO:0020021).
PO:0006044 inner integument epidermis PO:0006043 A portion of integument epidermis (PO:0006043) of the inner integument (PO:0020022) in a plant ovule (PO:0020003).
PO:0006045 outer integument epidermis PO:0006043 A portion of integument epidermis (PO:0006043) of the outer integument (PO:0020023) in a plant ovule (PO:0020003).
PO:0006048 seed coat epidermis PO:0005679 A portion of epidermis (PO:0005679) that is part of a seed coat (PO:0009088).
PO:0006050 exotesta PO:0006048 A portion of seed coat epidermis (PO:0006048) which is part of the seed coat (PO:0009088), and develops from the outer surface of the outer integument (PO:0020023).
PO:0006051 endotesta PO:0006048 A portion of seed coat epidermis (PO:0006048) which is part of a seed coat (PO:0009088) and develops from the inner epidermis of the outer integument (PO:0020023).
PO:0006052 petal abaxial epidermis PO:0006041 A portion of petal epidermis that covers the abaxial/lower surface of a petal.
PO:0006053 petal adaxial epidermis PO:0006041 A portion of petal epidermis that covers the adaxial/upper surface of a petal.
PO:0006054 sepal abaxial epidermis PO:0006040 A portion of sepal epidermis that covers the abaxial/lower surface of a sepal.
PO:0006055 sepal adaxial epidermis PO:0006040 A portion of sepal epidermis that covers the adaxial/upper surface of a sepal.
PO:0006056 cotyledon epidermis PO:0006016 A leaf epidermis that is part of a cotyledon.
PO:0006057 cotyledon abaxial epidermis PO:0006056 The abaxial/lower epidermal cell layer of the cotyledon.
PO:0006058 cotyledon adaxial epidermis PO:0006056 The adaxial/upper epidermal cell layer of the cotyledon.
PO:0006060 filament epidermis PO:0025097 A portion of stamen epidermis that is part of a filament.
PO:0006061 stigma epidermis PO:0025096 A portion of carpel epidermis (PO:0025096) that is part of a stigma (PO:0009073).
PO:0006062 style epidermis PO:0025096 A portion of carpel epidermis (PO:0025096) that is part of a style (PO:0009074).
PO:0006063 plant ovary epidermis PO:0025096 A portion of epidermis (PO:0005679) that is part of an plant ovary wall (PO:0005022).
PO:0006065 hypocotyl endodermis PO:0000252 A portion of endodermis (PO:0000252) that is part of a hypocotyl (PO:0020100).
PO:0006066 petiole parenchyma PO:0005421 A portion of parenchyma tissue that is part of a petiole.
PO:0006068 sepal parenchyma PO:0005421 A portion of parenchyma tissue that is part of a sepal.
PO:0006069 petal parenchyma PO:0005421 A portion of parenchyma (PO:0005421) tissue that is part of a petal (PO:0009032).
PO:0006070 mesophyll PO:0005426 The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the leaf or leaf like organs.
PO:0006071 petal mesophyll PO:0006069 The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the petal.
PO:0006072 sepal mesophyll PO:0006068 The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the sepal.
PO:0006073 intercalary meristem PO:0006079 A shoot system meristem (PO:0006079) that is intercalated between two portions of non-meristematic tissue and results in an increase in length as part of primary growth.
PO:0006075 primary phloem PO:0005417 A portion of phloem (PO:0005417) tissue that develops from the procambium (PO:0025275).
PO:0006076 metaphloem PO:0006075 A portion of primary phloem (PO:0006075) tissue that has as parts companion cells (PO:0000071, in angiosperms) or albuminous cells (PO:0025412, in gymnosperms) associated with the sieve elements (PO:0025406) and that develops after the protophloem (PO:0006077).
PO:0006077 protophloem PO:0006075 A portion of primary phloem (PO:0006075) tissue has as parts the first-formed sieve elements (PO:0025406) at a particular location and does not have companion cells (PO:0000071, in angiosperms) or albuminous cells (PO:0025412, in gymnosperms) associated with the sieve elements.
PO:0006079 shoot system meristem PO:0009013 A portion of meristem tissue (PO:0009013) that is part of a shoot system (PO:0009006).
PO:0006081 primary root apical meristem PO:0020147 A root apical meristem (PO:0020147) that gives rise to a primary root (PO:0020127).
PO:0006082 abaxial protoderm PO:0006210 A portion of protoderm (PO:0006210) tissue that is the outermost layer of the shoot apical meristem (PO:0020148), and gives rise to the leaf abaxial epidermis (PO:0006019).
PO:0006083 adaxial protoderm PO:0006210 A portion of protoderm (PO:0006210) tissue that is the outermost layer of the shoot apical meristem (PO:0020148), and gives rise to the leaf adaxial epidermis (PO:0006018).
PO:0006084 portion of transfusion tissue PO:0009007 Tissue consisting of tracheids and parenchyma cells, associated with the vascular bundle.
PO:0006085 root meristem PO:0009013 A portion of meristem tissue (PO:0009013) that gives rise to a root (PO:0009005).
PO:0006088 primary sporogenous cell PO:0025606 A native plant cell (PO:0025606) is formed by the division of the male archesporial initial. After several mitotic divisions these cells differentiate into pollen mother cells.
PO:0006089 anther primordium PO:0025477 A floral structure primordium (PO:0025477) that is committed to the development of an anther (PO:0009066).
PO:0006090 organogenic callus PO:0000009 A cultured plant callus that is capable of forming plant organs.
PO:0006091 embryogenic callus PO:0000009 A cultured plant callus (PO:0000009) that is capable of forming somatic embryos.
PO:0006109 pith PO:0005421 A maximal portion of parenchyma (PO:0005421) in the center of a shoot axis (PO:0025029) or root (PO:0009005).
PO:0006200 fascicular cambium PO:0005598 A portion of vascular cambium (PO:0005598) that develops from a procambium (PO:0025275) in a vascular bundle (PO:0005020) that is part of a shoot system (PO:0009006).
PO:0006201 interfascicular cambium PO:0005598 A portion of vascular cambium (PO:00055980) that develops from cells in an interfascicular region (PO:0006202) that is part of a shoot system (PO:0009006).
PO:0006202 interfascicular region PO:0025059 A portion of ground tissue (PO:0025059) located between vascular bundles in a shoot axis.
PO:0006203 pericycle PO:0025059 A portion of ground tissue (PO:0025059) that is part of a root stele located between the phloem and endodermis.
PO:0006204 sporocyte PO:0025606 A native plant cell (PO:0025606) which is diploid (2n), and undergoes meiosis (GO:0007126) to produce four haploid (1n) plant spores (PO:0025017).
PO:0006205 spongy mesophyll cell PO:0004006 Irregularly-shaped, chlorenchymatous cell, separated by large air spaces.
PO:0006206 palisade mesophyll cell PO:0004006 Elongated chlorenchymatous cell oriented perpendicular to the leaf surface and which is active in photosynthesis.
PO:0006207 exodermal passage cell PO:0000353 A short cell in the dimorphic type of exodermis with cell wall that remains non-thickened.
PO:0006208 endodermal passage cell PO:0000353 Cell in the endodermal layer of the root with cell wall that remains non-thickened.
PO:0006210 protoderm PO:0009013 A portion of meristem tissue (PO:0009013) that is the outer layer of an apical meristem (PO:0020144), or the outer layer of a plant embryo proper (PO:0000001), and gives rise to a portion of epidermis (PO:0005679).
PO:0006211 separation layer PO:0009007 A portion of plant tissue (PO:0009007) that is part of an abscission zone (PO:0000146) and contains cells that develop an abnormal wall chemistry and swelling resulting in their easily being pulled apart along the pectin-rich middle lamella (GO:0009519).
PO:0006212 protective layer PO:0009007 A portion of plant tissue (PO:0009007) composed of a layer of cells that is part of the abscission zone (PO:0000146) that have lignin and suberin depositions and are found on the axial side of the break or exposed surface of abscission.
PO:0006213 root aerenchyma PO:0005702 Parenchyma tissue containing particularly large intercellular spaces in the tissue of roots.
PO:0006214 stem aerenchyma PO:0005702 A portion of aerenchyma that is part of a stem.
PO:0006215 leaf aerenchyma PO:0005702 A portion of parenchyma tissue containing particularly large intercellular spaces in the leaf mesophyll.
PO:0006216 internal phloem PO:0006075 A portion of primary phloem tissue positioned internal to the primary xylem.
PO:0006218 exotegmen PO:0006048 A portion of seed coat epidermis (PO:0006048) which is part of the seed coat (PO:0009088) and develops from the outer surface of the inner integument (PO:0020022).
PO:0006219 endotegmen PO:0006048 A portion of seed coat epidermis (PO:0006048) which is part of the seed coat (PO:0009088) and develops from the inner epidermis of the inner integument (PO:0020022).
PO:0006220 central endosperm PO:0009007 A portion of plant tissue (PO:0009007) that is the central region of an endosperm (PO:0009089), composed of cells that are significantly larger than those at the periphery, especially the aleurone and sub-aleurone layers.
PO:0006221 articulated laticifer cell PO:0025031 A laticifer cell (PO:0025031) that is joined longitudinally to other articulated laticifer cells to form a tube.
PO:0006222 non-articulated laticifer cell PO:0025031 A laticifer cell (PO:0025031) that is not joined longitudinally to other laticifer cells to form a tube.
PO:0006307 root procambium PO:0025275 A portion of procambium (PO:0025275) tissue that undergoes differentiation to form the primary vascular tissue (PO:0025408) of a root (PO:0009005).
PO:0006308 root lateral meristem PO:0020145 A lateral meristem (PO:0020145) that is part of a root (PO:0009005).
PO:0006309 tassel spikelet PO:0009051 A spikelet (PO:0009051) that is part of the tassel inflorescence (PO:0020126) and bears tassel florets (PO:0006310) at maturity.
PO:0006310 tassel floret PO:0009082 A small staminate flower (PO:0025600) that is part of a tassel spikelet (PO:0006309).
PO:0006311 tassel sessile spikelet PO:0006309 A tassel spikelet (PO:0006309) which is the ultimate, sessile, higher order inflorescence axis (PO:0009081) of the maize tassel inflorescence (PO:0020126).
PO:0006312 tassel pedicellate spikelet PO:0006309 A tassel spikelet (PO:0006309) which is the ultimate, pedicellate, higher order inflorescence axis (PO:0009081) of the maize tassel inflorescence (PO:0020126).
PO:0006313 lower floret of pedicellate spikelet of tassel PO:0006310 A tassel floret that is the lower of the two florets of a pedicellate spikelet of a tassel inflorescence.
PO:0006314 upper floret of pedicellate spikelet of tassel PO:0006310 A tassel floret that is one of the two florets placed above the lower floret on a pedicellate spikelet rachilla of a tassel inflorescence.
PO:0006315 lower floret of sessile spikelet of tassel PO:0006310 A tassel floret that is the lower of the two florets of a sessile spikelet of a tassel inflorescence.
PO:0006316 upper floret of sessile spikelet of tassel PO:0006310 A tassel floret that is one of the two florets placed above the lower floret on a sessile spikelet rachilla of a tassel inflorescence.
PO:0006319 spikelet pedicel PO:0009081 Inflorescence branch that terminates in a spikelet.
PO:0006320 ear spikelet PO:0009051 A spikelet (PO:0009051) that is part of the ear inflorescence (PO:0020136) and bears a single ear floret (PO:0006354) at maturity.
PO:0006321 second order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a first order inflorescence axis (PO:0025104).
PO:0006322 third order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a second order inflorescence axis (PO:0006322).
PO:0006323 tassel inflorescence branch PO:0009081 An inflorescence branch (PO:0009081) arising on a first order tassel inflorescence axis (PO:0006324) or from a higher order inflorescence branch (PO:0009081) that is part of a tassel inflorescence (PO:0020126).
PO:0006324 first order tassel inflorescence axis PO:0025104 A first order inflorescence axis (PO:0025104) that is the primary axis of a tassel inflorescence (PO:0020126).
PO:0006325 inflorescence axis node PO:0005004 A shoot axis node (PO:0005004) that is part of an inflorescence axis (PO:0020122).
PO:0006326 inflorescence axis internode PO:0005005 A shoot axis internode (PO:0005005) that is part of an inflorescence axis (PO:0020122).
PO:0006327 spikelet meristem PO:0009108 An inflorescence apical meristem that gives rise to the two or more florets of a grass inflorescence.
PO:0006328 spikelet pair meristem PO:0006327 The meristem that produces two spikelet meristems, each of which produces two floral meristems.
PO:0006330 gynophore PO:0025029 A shoot axis that is an elongation of the floral axis that supports the carpels.
PO:0006331 seed raphe PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is a ridge on a seed (PO:0009010) that develops from a raphe (PO:0020027).
PO:0006332 seed funicle PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is attached to a seed (PO:0009010) and is the remnants of a funicle (PO:0020006).
PO:0006333 seed chalaza PO:0009007 A remnant of the ovular chalaza that is part of the seed.
PO:0006336 seed obturator PO:0009007 An outgrowth of the seed funicle, that forms a bridge between the seed micropyle and other tissues. It is also a remnant form of the obturator found in the ovular funicle.
PO:0006338 embryo leaf PO:0009025 A vascular leaf that is part of a plant embryo and is one of the first few leaves to develop from the embryonic shoot apical meristem.
PO:0006339 juvenile vascular leaf PO:0009025 A vascular leaf that is distinct from adult leaves, being characterized by particular anatomical traits namely, wax and trichome distribution, presence or absence of epidermal cell types, cell wall shape and biochemistry.
PO:0006340 adult vascular leaf PO:0009025 A vascular leaf characterized by particular anatomical traits namely, wax and trichome distribution, presence or absence of epidermal cell types, cell wall shape and biochemistry.
PO:0006341 primary shoot system PO:0009006 A shoot system (PO:0009006) that develops from an embryo shoot apical meristem (PO:0006362).
PO:0006342 infructescence PO:0025082 A reproductive shoot system (PO:0025082) that develops from an inflorescence (PO:0009049) and has as parts each infructescence axis (PO:0025242) and all of the fruits (PO:0009001) borne by those axes.
PO:0006343 axillary shoot system PO:0004545 A shoot-borne shoot system (PO:0004545) that develops from an axillary bud (PO:0004709).
PO:0006344 shoot lateral meristem PO:0020145 A lateral meristem (PO:0020145) that is part of a shoot axis (PO:0025029).
PO:0006346 leaf intercalary meristem PO:0006073 An intercalary meristem (PO:0006073) that is part of a leaf (PO:0006346) and is intercalated between two portions of non-meristematic tissue between a leaf apex (PO:0020137) and a leaf base (PO:0020040).
PO:0006347 stem intercalary meristem PO:0006073 An intercalary meristem (PO:0006073) that is part of a stem internode (PO:0020142) and is intercalated between two portions of non-meristematic tissue.
PO:0006348 ear pedicellate spikelet PO:0006320 An ear spikelet (PO:0006320) which is the ultimate, pedicellate, higher order inflorescence axis (PO:0009081) of the maize ear inflorescence (PO:0020136).
PO:0006349 ear sessile spikelet PO:0006320 An ear spikelet (PO:0006320) which is the ultimate, sessile, higher order inflorescence axis (PO:0009081) of the maize ear inflorescence (PO:0020136).
PO:0006350 upper floret of pedicellate spikelet of ear PO:0006354 An ear floret that is the upper of the two florets of a pedicellate spikelet rachilla of an ear inflorescence.
PO:0006351 lower floret of sessile spikelet of ear PO:0006354 An ear floret that is the lower of the two florets on a sessile spikelet of an ear inflorescence.
PO:0006352 upper floret of sessile spikelet of ear PO:0006354 An ear floret that is one of the two florets placed above the lower floret on a sessile spikelet rachilla of an ear inflorescence.
PO:0006353 lower floret of pedicellate spikelet of ear PO:0006354 An ear floret that is the lower of the two florets of a pedicellate spikelet rachilla of an ear inflorescence.
PO:0006354 ear floret PO:0009082 A small, pistillate flower (PO:0025599) that is part of a ear spikelet (PO:0006320).
PO:0006358 tassel spikelet pair meristem PO:0006328 The meristem present on short tassel branch that produces two spikelet meristems, each of which produces two floral meristems in a maize tassel.
PO:0006360 ear spikelet pair meristem PO:0006328 An ear inflorescence axillary meristem (PO:0009110) that produces two ear spikelet meristems (PO:0006378), each of which produces two flower meristems (PO:0000229) in an ear inflorescence (PO:0020136). {comment=NYBG:Brandon_Sinn}
PO:0006362 embryo shoot apical meristem PO:0008016 A vegetative shoot apical meristem at the apex of the embryonic axis.
PO:0006367 glume of ear spikelet PO:0009039 A glume that is part of an ear spikelet.
PO:0006368 glume of tassel spikelet PO:0009039 A glume that is part of a tassel spikelet.
PO:0006369 lower glume of ear spikelet PO:0006002 A lower glume that is part of an ear spikelet.
PO:0006370 upper glume of tassel spikelet PO:0006004 An upper glume that is part of a tassel spikelet.
PO:0006371 upper glume of ear spikelet PO:0006004 An upper glume that is part of an ear spikelet.
PO:0006372 lower glume of tassel spikelet PO:0006002 A lower glume that is part of a tassel spikelet.
PO:0006375 ear apical meristem PO:0009108 An inflorescence apical meristem that gives rise to the maize ear.
PO:0006376 tassel apical meristem PO:0009106 An inflorescence apical meristem that gives rise to the maize tassel.
PO:0006377 tassel spikelet meristem PO:0006327 Apical meristem that gives rise to the upper and lower florets of the maize tassel spikelets.
PO:0006378 ear spikelet meristem PO:0006327 Apical meristem that gives rise to the upper and lower florets of the maize ear spikelet.
PO:0006379 tassel spikelet rachilla PO:0006323 The axis of the tassel spikelet, above the glumes.
PO:0006380 ear spikelet rachilla PO:0009080 The axis of the ear spikelet, above the glumes.
PO:0006385 lower glume of pedicellate spikelet of tassel PO:0006372 A lower glume of tassel spikelet that is part of a tassel pedicellate spikelet.
PO:0006386 lower glume of sessile spikelet of tassel PO:0006372 A lower glume of tassel spikelet that is part of a tassel sessile spikelet.
PO:0006387 upper glume of sessile spikelet of tassel PO:0006370 An upper glume of tassel spikelet that is part of a tassel sessile spikelet.
PO:0006388 upper glume of pedicellate spikelet of tassel PO:0006370 An upper glume of tassel spikelet that is part of a tassel pedicellate spikelet.
PO:0006389 rachilla of sessile spikelet of tassel PO:0006379 The axis of the tassel sessile spikelet, above the glumes.
PO:0006390 rachilla of pedicellate spikelet of tassel PO:0006379 The axis of the tassel pedicellate spikelet, above the glumes.
PO:0006415 pedicel of ear spikelet PO:0006319 This is the ultimate branch of the pedicellate ear spikelet.
PO:0006416 pedicel of tassel spikelet PO:0006319 This is the ultimate branch of the pedicellate tassel spikelet.
PO:0006417 tassel peduncle PO:0009053 A peduncle of a maize tassel, below the lowest tassel node.
PO:0006418 ear peduncle PO:0009053 A peduncle of a maize ear, below the lowest ear node.
PO:0006435 rachilla of pedicellate spikelet of ear PO:0006380 The axis of the ear pedicellate spikelet, above the glumes.
PO:0006436 rachilla of sessile spikelet of ear PO:0006380 The axis of the ear sessile spikelet, above the glumes.
PO:0006437 lower glume of pedicellate spikelet of ear PO:0006369 A lower glume of ear spikelet that is part of an ear pedicellate spikelet.
PO:0006438 lower glume of sessile spikelet of ear PO:0006369 A lower glume of ear spikelet that is part of an ear sessile spikelet.
PO:0006439 upper glume of pedicellate spikelet of ear PO:0006371 An upper glume of ear spikelet that is part of an ear pedicellate spikelet.
PO:0006440 upper glume of sessile spikelet of ear PO:0006371 An upper glume of ear spikelet that is part of an ear sessile spikelet.
PO:0006488 silk PO:0025269 A collective organ part structure (PO:0025269) that has as parts an elongated stigma (PO:0009073) with stigma papilla (GO:0090397), and an elongated style (PO:0009074).
PO:0006501 leaf abscission zone PO:0000146 An abscission zone (PO:0000146) at the base of a vascular leaf (PO:0009025) where it separates during leaf abscission (GO:0060866).
PO:0006502 floral organ abscission zone PO:0000146 An abscission zone (PO:0000146) at the base of a flower (PO:0009001) where a floral organ (PO:0025395) separates during floral organ abscission (GO:0010227).
PO:0006503 fruit abscission zone PO:0000146 An abscission zone (PO:0000146) at the base of a fruit (PO:0009001) where the fruit separates from a fruit pedicel (PO:0030114) during fruit abscission (GO:0060867).
PO:0006504 leaf trichome PO:0025186 A phyllome trichome that is part of a leaf epidermis.
PO:0006505 first order ear inflorescence axis PO:0025104 A first order inflorescence axis (PO:0025104) that is the primary axis of an ear inflorescence (PO:0020136).
PO:0008001 fruit distal end PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is the end of a fruit (PO:0009001) distal from a fruit pedicel (PO:0004536).
PO:0008002 fruit proximal end PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is the end of a fruit (PO:0009001) proximal to a fruit pedicel (PO:0004536).
PO:0008003 fruit vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue (PO:0009015) in their specific arrangement in a fruit (PO:0009001).
PO:0008005 fruit nucellus PO:0020020 A nucellus that is part of a fruit.
PO:0008006 nucellar epidermis PO:0025312 A portion of plant tissue that is the morphologically distinct outer layer of the nucellus.
PO:0008007 nucellar projection PO:0009007 A portion of plant tissue (PO:0009007) that is the morphologically distinct portion of the nucellus overlying the vascular strands in the grass caryopsis.
PO:0008008 modified aleurone PO:0005360 A portion of aleurone layer (PO:0005360) which is morphologically distinct and is located adjacent to the nucellar projection (PO:0008007).
PO:0008009 abaxial nucellar projection PO:0009007 A portion of plant tissue (PO:0009007) that is the abaxial/lower portion of the nucellus (PO:0020020) overlying vascular strands in a caryopsis fruit (PO:0030104).
PO:0008010 adaxial nucellar projection PO:0009007 A portion of plant tissue (PO:0009007) that is the adaxial/upper portion of the nucellus (PO:0020020) overlying vascular strands in a caryopsis fruit (PO:0030104).
PO:0008011 plant embryo vascular system PO:0000034 A vascular system (PO:0000034) that is part of a plant embryo (PO:0009009) .
PO:0008012 stigma vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue in their specific arrangement in a stigma (PO:0009073).
PO:0008013 anther vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in an anther (PO:0009066).
PO:0008014 filament vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue (PO:0009015) in their specific arrangement in a filament (PO:0009067).
PO:0008015 hypocotyl vascular system PO:0000034 A vascular system (PO:0000034) that is part of a hypocotyl (PO:0020100).
PO:0008016 vegetative shoot apical meristem PO:0020148 A shoot apical meristem (PO:0020148) that gives rise to the apical growth of vegetative tissues and organs.
PO:0008017 leaf sheath pulvinus PO:0009000 A more or less abrupt swelling, especially at the apex or base of a leaf sheath.
PO:0008018 transition vascular leaf PO:0009025 A vascular leaf that is part of an heteroblastic series, and is characterized by anatomical features that are intermediate between juvenile and adult leaves.
PO:0008019 leaf lamina base PO:0025001 The region of the leaf lamina proximal to the stem and usually connected to it by means of a petiole.
PO:0008020 central zone of the leaf lamina PO:0025001 Region that includes the widest or majority portion of leaf lamina and that does not include leaf apex and leaf lamina base.
PO:0008021 tertiary leaf vein PO:0020138 A leaf lamina vein (PO:0020138) arising from a secondary leaf vein (PO:0020140).
PO:0008022 quaternary leaf vein PO:0020138 A leaf lamina vein (PO:0020138) arising from a tertiary leaf vein (PO:0008021).
PO:0008023 higher order leaf vein PO:0020138 A leaf lamina vein (PO:0020138) arising from a quaternary (PO:0008022) or other higher order leaf vein.
PO:0008024 petiole proximal end PO:0025001 The region of the petiole proximal to its stem attachment site.
PO:0008025 central zone of the petiole PO:0025001 Regions of the petiole that does not include petiole distal end and petiole proximal end.
PO:0008026 petiole distal end PO:0025001 The region of the petiole distal to its stem attachment site or proximal to the leaf lamina.
PO:0008027 petiole adaxial epidermis PO:0000051 A portion of petiole epidermis that covers the adaxial/upper surface of a petiole.
PO:0008028 reproductive shoot apical meristem PO:0020148 A shoot apical meristem (PO:0020148) that gives rise to the apical growth of reproductive tissues and organs.
PO:0008029 petiole abaxial epidermis PO:0000051 A portion of petiole epidermis that covers the abaxial/lower surface of a petiole.
PO:0008030 trichome cell PO:0025606 A plant cell (PO:0009002) that is part of a multicellular trichome (PO:0000282).
PO:0008035 plerome PO:0009013 A meristem forming the core of the axis composed of the primary vascular tissues and associated ground tissue, such as pith and interfascicular regions.
PO:0008036 periblem PO:0009013 A portion of meristem tissue that forms the cortex.
PO:0008039 stem base PO:0025001 The basal part of stem.
PO:0008040 lodicule primordium PO:0025128 A phyllome primordium (PO:0025128)that develops from a lodicule anlagen (PO:0025483) and is committed to the development of a lodicule (PO:0009036).
PO:0008041 stem internode elongation zone PO:0025100 A shoot axis internode elongation zone (PO:0025100) that is part of a stem internode (PO:0009047).
PO:0008042 stem internode differentiation zone PO:0025102 A shoot internode differentiation zone that is part of a stem internode.
PO:0008047 scutellum vascular system PO:0000034 A vascular system (PO:0000034) that is part of a scutellum (PO:0020110).
PO:0008048 scutellar epithelium PO:0025233 A continuous layer of cylindrical cells covering the endosperm side of the scutellum. Thought to act as a secretory and absorptive organ.
PO:0009000 pulvinus PO:0025001 A cardinal organ part (PO:0025001) at the apex or base of a petiole, petiolule, leaf sheath, or branch that is differentiated from the remaining organ parts by its enlarged cross section.
PO:0009001 fruit PO:0025496 A multi-tissue plant structure (PO:0025496) that develops from a gynoecium (PO:0009062), or a single carpel (PO:0009030), and at maturity may have as parts one or more seeds (PO:0009010).
PO:0009002 plant cell PO:0009011 A cell which is a plant structure (PO:0009011).
PO:0009005 root PO:0025004 A plant axis (PO:0025004) that lacks shoot axis nodes (PO:0005004) and usually grows indeterminately.
PO:0009006 shoot system PO:0025007 A collective plant organ structure (PO:0025007) that produces shoot-borne portions of meristem tissue (PO:0009013) and the plant structures (PO:0009011) that arise from them.
PO:0009007 portion of plant tissue PO:0009011 A plant structure (PO:0009011) that consists predominantly of similarly specialized plant cells (PO:0009002) of one or more types.
PO:0009008 plant organ PO:0025496 A multi-tissue plant structure (PO:0025496) that is a functional unit, is a proper part of a whole plant (PO:0000003), and includes portions of plant tissue (PO:0009007) of at least two different types that derive from a common developmental path.
PO:0009009 plant embryo PO:0000003 A whole plant (PO:0000003) that participates in the plant embryo stage (PO:0007631).
PO:0009010 seed PO:0025496 A multi-tissue plant structure (PO:0025496) that develops from a plant ovule (PO:0020003) and has as parts a plant embryo (PO:0009009) enclosed in a seed coat (PO:0009088).
PO:0009011 plant structure PO:0025131 A plant anatomical entity (PO:0025131) that is, or was, part of a plant, or was derived from a part of a plant.
PO:0009013 portion of meristem tissue PO:0009007 A portion of plant tissue (PO:0009007) in which plant cells (PO:0009002) have retained their embryonic characteristics, or have reverted to them secondarily, and that divide to produce new cells that can undergo differentiation to form mature tissues, i.e. they have a capacity for morphogenesis and growth.
PO:0009015 portion of vascular tissue PO:0009007 A portion of plant tissue (PO:0009007) that has as part one or more tracheary elements (PO:0000290) or sieve elements (PO:0025406).
PO:0009017 inflorescence branch pulvinus PO:0009000 A pulvinus (PO:0009000) of an inflorescence branch (PO:0009081).
PO:0009018 basal endosperm transfer cell PO:0000078 A transfer cell that is part of a basal endosperm transfer layer.
PO:0009020 meristem L1 layer PO:0009013 A portion of meristem tissue (PO:0009013) that is the outermost layer of a shoot apical meristem (PO:0020148) and gives rise to a shoot system epidermis (PO:0006035).
PO:0009021 meristem L2 layer PO:0009013 A portion of meristem tissue (PO:0009013) directly beneath a meristem L1 layer (PO:0009020) in a shoot apical meristem (PO:0020148) which gives rise to ground tissue (PO:0025059).
PO:0009022 meristem L3 layer PO:0009013 A portion of meristem tissue (PO:0009013) beneath a meristem L2 layer (PO:0009021) in a shoot apical meristem (PO:0020148) which gives rise to internal tissues of leaf and stem.
PO:0009025 vascular leaf PO:0025034 A leaf (PO:0025034) in a vascular plant.
PO:0009026 sporophyll PO:0006001 A leaf-like organ on which one or more sporangia are borne.
PO:0009027 megasporophyll PO:0009026 A structure upon which (or in the axil of which) one or more megasporangia are borne; in flowering plants, a carpel.
PO:0009028 microsporophyll PO:0009026 A structure on which one or more microsporangia are borne; in flowering plants, the stamen.
PO:0009029 stamen PO:0009028 A microsporophyll bearing one or more microsporangia.
PO:0009030 carpel PO:0009027 A megasporophyll, almost always at the center of a flower, its margins more or less fused together or with other carpels to enclose the ovule(s).
PO:0009031 sepal PO:0006001 A phyllome (PO:0006001) that is usually green, and is part of the calyx (PO:0009060).
PO:0009032 petal PO:0006001 A phyllome (PO:0006001) that is part of the corolla (PO:0009059), and is usually colored (not green).
PO:0009033 tepal PO:0006001 A phyllome (PO:0006001) that is part of a perianth (PO:0009058) where it is not possible to distinguish between the petals (PO:0009032) and sepals (PO:0009031).
PO:0009034 flower bract PO:0009055 A bract (PO:0009055) that subtends a perianth (PO:0009058) that is part of a flower (PO:0009046).
PO:0009035 nectary PO:0005656 A portion of secretory tissue (PO:0005656) which is a multicellular glandular structure secreting a liquid containing organic substances, including sugars.
PO:0009036 lodicule PO:0006001 A phyllome that is part of a grass floret and is one of two or three tiny scales or flaps of tissue outside the stamens.
PO:0009037 lemma PO:0009034 The lower, usually larger, of the pair of flower bracts (PO:0009034) enclosing a (PO:0009082) spikelet floret.
PO:0009038 palea PO:0009034 The upper (distal), usually smaller, of the pair of flower bracts (PO:0009034) enclosing a (PO:0009082) spikelet floret.
PO:0009039 glume PO:0009054 One of a pair of inflorescence bracts that is part of a spikelet and subtends the two florets.
PO:0009040 sterile lemma PO:0009037 A flower bract in the position of a lemma, but not enclosing floral organs.
PO:0009041 fertile lemma PO:0009037 A lemma that encloses a functional flower, with androecium, gynoecium or both.
PO:0009042 prophyll PO:0006001 A phyllome that is the first organ or one of the first two organs formed at the base of an axillary shoot, often smaller and/or in a distinctively different position from leaves formed subsequently.
PO:0009043 bracteole PO:0009042 A prophyll (PO:0009042) which is borne singly or in pairs on a pedicel (PO:0030112).
PO:0009044 perigynium PO:0009042 Sac-like bract subtending the pistillate flower, as in <i>Carex</i>.
PO:0009045 involucral bract PO:0009054 An inflorescence bract (PO:0009054) of an involucre (PO:0009100). {comment=POC:Laurel_Cooper}
PO:0009046 flower PO:0025082 A determinate reproductive shoot system (PO:0025082) that has as part at least one carpel (PO:0009030) or at least one stamen (PO:0009029) and does not contain any other determinate shoot system (PO:0009006) as a part.
PO:0009047 stem PO:0025029 A shoot axis (PO:0025029) that is the primary axis of a plant.
PO:0009049 inflorescence PO:0025082 A reproductive shoot system (PO:0025082) that has as parts all of the shoot axes (PO:0025029) and flowers (PO:0009046; must have two or more) distal to the most distal leaf (PO:0009025).
PO:0009051 spikelet PO:0025082 A reproductive shoot system (PO:0025082) that is the ultimate and congested, higher order inflorescence axis (PO:0009081) of the grasses.
PO:0009052 inflorescence flower pedicel PO:0030113 A flower pedicel (PO:0030113) that bears a flower (PO:0009046) in an inflorescence (PO:0009049).
PO:0009053 peduncle PO:0025029 A shoot axis that extends from the last foliage leaf on a stem or branch until the next distal node.
PO:0009054 inflorescence bract PO:0009055 A bract (PO:0009055) subtending a branch of the inflorescence (PO:0009049) or borne on the inflorescence axis (PO:0020122) below any branch (PO:0025073) or flower (PO:0009046).
PO:0009055 bract PO:0006001 A phyllome that subtends a reproductive structure.
PO:0009056 flower nectary PO:0009035 A nectary (PO:0009035) occurring on a floral organ (PO:0025395) or other part of a flower (PO:0009046).
PO:0009057 extrafloral nectary PO:0009035 A nectary (PO:0009035), not occurring on a floral organ (PO:0025395) or other part of a flower (PO:0009046).
PO:0009058 perianth PO:0025023 A collective phyllome structure (PO:0025023) that includes as parts the corolla (PO:0009059) and/or the calyx (PO:0009060); or one or more tepals (PO:0009033).
PO:0009059 corolla PO:0025023 A collective phyllome structure (PO:0025023) that is composed of one or more petals (PO:0009032), comprising the inner whorl of non-reproductive floral organs (PO:0025395) and surrounds the androecium (PO:0009061) and the gynoecium (PO:0009062).
PO:0009060 calyx PO:0025023 A collective phyllome structure (PO:0025023) that is composed of one or more sepals (PO:0009031), and comprises the outer whorl of non-reproductive floral organs (PO:0025395).
PO:0009061 androecium PO:0025023 A collective phyllome structure (PO:0025023) composed all of the stamens (PO:0009029) in a flower (PO:0009046).
PO:0009062 gynoecium PO:0025023 A collective phyllome structure (PO:0025023) composed all of the carpels (PO:0009030) in a flower (PO:0009046).
PO:0009063 epicalyx PO:0025023 A collective phyllome structure (PO:0025023) composed of two or more phyllomes immediately outside the calyx (PO:0009060).
PO:0009064 receptacle PO:0025001 A cardinal organ part (PO:0025001) that is the region at the distal end of either a peduncle or a pedicel where the floral appendages (e.g.: sepals, petals, stamens and pistils) are attached.
PO:0009065 hypanthium PO:0025001 A cup- or tube-shaped cardinal organ part, bearing perianth and stamens on its rim, so these arise above the base, and often above the top, of the ovary.
PO:0009066 anther PO:0025007 A collective plant organ structure (PO:0025007) that is the pollen-bearing part of a stamen (PO:0009029).
PO:0009067 filament PO:0025066 A stalk (PO:0025066) that is part of a stamen (PO:0009029).
PO:0009068 connective PO:0025001 The part of the stamen that connects the microsporangia/pollen sacs.
PO:0009069 anther theca PO:0025007 A collective plant organ structure (PO:0025007) that is part of an anther (PO:0009066) and consists of a pair of sporangia (PO:0025094) that dehisce down a common slit.
PO:0009071 anther wall tapetum PO:0025314 A microsporangium tapetum (PO:0025314) that is part of an anther wall (PO:0000002).
PO:0009072 plant ovary PO:0009011 A plant structure (PO:0009011) that is the basal portion of a carpel (PO:0009030) or group of fused carpels (gynoecium; PO:0009062) and encloses the plant ovule(s) (PO:0020003).
PO:0009073 stigma PO:0025001 A cardinal organ part (PO:0025001), usually apical, that is part of a carpel (PO:0009030) or group of fused carpels on which the pollen (PO:0025281) germinates.
PO:0009074 style PO:0025001 A cardinal organ part (PO:0025001) which is an elongated part of a carpel (PO:0009030) or gynoecium (PO:0009062) between the plant ovary (PO:0009072) and the stigma (PO:0009073), and through which the pollen tube (GO:0090406) grows.
PO:0009077 staminode PO:0009028 Sterile stamen.
PO:0009078 pistillode PO:0009062 A sterile pistil, often rudimentary.
PO:0009080 spikelet rachilla PO:0009081 The axis of the spikelet, above the glumes.
PO:0009081 higher order inflorescence axis PO:0020122 An inflorescence axis (PO:0020122) that develops from an inflorescence axillary meristem (PO:0009105) of an inflorescence axis (PO:0020122).
PO:0009082 spikelet floret PO:0009046 A small flower (PO:0009046) that is part of a spikelet (PO:0009051).
PO:0009084 pericarp PO:0009007 A portion of plant tissue (PO:0009007) that is the outer layer (wall) of a fruit (PO:0009001), and develops from a plant ovary (PO:0009072) or a carpel (PO:0009030) wall.
PO:0009085 exocarp PO:0009007 A portion of plant tissue (PO:0009007) that is the outer layer of a pericarp (PO:0009084).
PO:0009086 endocarp PO:0009007 A portion of plant tissue (PO:0009007) that is the innermost differentiated layer of a pericarp (PO:0009084).
PO:0009087 mesocarp PO:0009007 A portion of plant tissue (PO:0009007) that is the middle layer of a pericarp (PO:0009084).
PO:0009088 seed coat PO:0009007 A portion of plant tissue that is the covering of a seed derived from ovular - mainly integumentary - tissue.
PO:0009089 endosperm PO:0009007 A portion of plant tissue (PO:0009007) which is a maximal portion of nutritive plant tissue in a seed (PO:0009010).
PO:0009090 aril PO:0019022 An arilloid that is an outgrowth of a seed from a seed funicle.
PO:0009100 involucre PO:0025023 A collective phyllome structure composed of two or more involucral bracts at the base of a cluster of flowers, as found in Asteraceae or Compositae.
PO:0009101 long lateral tassel branch PO:0006323 The long branch that arise from the central spike of tassel in maize.
PO:0009102 short tassel branch PO:0006323 The very short branch that may arise from either or both the long lateral branch and the central spike of tassel in maize.
PO:0009103 short tassel branch meristem PO:0009107 The meristem present on either or both the long lateral branch and central spike of a maize tassel that gives rise to short tassel branch.
PO:0009104 long lateral tassel branch meristem PO:0009107 The meristem that gives rise to the long lateral branch in the maize tassel.
PO:0009105 inflorescence axillary meristem PO:0000230 An inflorescence meristem (PO:0009108) that gives rise to a higher order inflorescence axis (PO:0009081).
PO:0009106 tassel meristem PO:0000230 Meristem that gives rise to the apical and lateral structures of the tassel inflorescence in maize.
PO:0009107 tassel inflorescence axillary meristem PO:0009105 An inflorescence axillary meristem (PO:0009105) that gives rise to the long lateral tassel branch (PO:0009101), short tassel branch (PO:0009102), and tassel spikelets (PO:0006309) in a tassel inflorescence (PO:0020126).
PO:0009108 inflorescence apical meristem PO:0000230 A reproductive shoot apical meristem that gives rise to the apical growth of the inflorescence. It develops from the shoot apical meristem (SAM) after it undergoes transition from vegetative to reproductive phase.
PO:0009109 ear meristem PO:0000230 The meristem which gives rise to the female inflorescence or ear in maize.
PO:0009110 ear inflorescence axillary meristem PO:0009105 An inflorescence axillary meristem (PO:0009105) that gives rise to a higher order inflorescence axis (PO:0009081) of an ear inflorescence (PO:0020136).
PO:0009111 petiole pulvinus PO:0009000 Pulvinus of the petiole.
PO:0019018 plant embryo axis PO:0025004 A plant axis (PO:0025004) that is the axial part of a plant embryo (PO:0009009).
PO:0019022 arilloid PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is a fleshy outgrowth of a seed (PO:0009010).
PO:0019023 strophiole PO:0019022 An arilloid that is an outgrowth of a seed on a raphe.
PO:0019024 seed operculum PO:0009007 A plug-like structure formed in the micropylar region of the seed coat.
PO:0019026 tracheid bar PO:0005352 A portion of xylem (PO:0005352) tissue that is a distinct ring-like structure composed of tracheids (PO:0000301), that is part of a seed (PO:0009010) and surrounds the hilum (PO:0020063) and forms a groove in the surface of the pericarp (PO:0009084) immediately adjacent to the hilum.
PO:0020001 plant ovary placenta PO:0025078 A portion of placenta tissue (PO:0025078) which is part of a plant ovary (PO:0009072), and to which plant ovary ovules (PO:0025490) are attached.
PO:0020002 anther wall endothecium PO:0025309 An microsporangium endothecium (PO:0025309) that part of an anther wall (PO:0000002).
PO:0020003 plant ovule PO:0009008 A plant organ (PO:0009008) that has as parts a nucellus (PO:0020020) in which a female gametophyte (PO:0025279) is located, one or two integuments (PO:0020021), and a funicle (PO:0020006).
PO:0020004 anther wall exothecium PO:0025097 An microsporangium exothecium that is part of an anther wall.
PO:0020005 placentoid PO:0005421 A portion of parenchyma tissue that is part of a connective and projects into a pollen sac.
PO:0020006 funicle PO:0025066 A stalk (PO:0025066) that attaches a plant ovule (PO:0020003) to a placenta (PO:0025078).
PO:0020019 megaspore PO:0025017 The larger, in general, of the two kinds of spores produced after meiosis in the life cycle of a heterosporous plant, and on germination giving rise to the female gametophyte (embryo sac).
PO:0020020 nucellus PO:0025201 A megasporangium (PO:0025201) in a seed plant, composed of fleshy subepidermal tissue that is part of a plant ovule (PO:0020003) and surrounds a megasporocyte (PO:0000431).
PO:0020021 integument PO:0009007 A portion of plant tissue (PO:0009007) that usually covers a plant ovule (PO:0020003), enveloping a nucellus (PO:0020020) and forming a micropyle (PO:0020025) at the apex.
PO:0020022 inner integument PO:0020021 An integument (PO:0020021) which is the innermost of the two layers of tissue that usually cover the ovule, contiguous to the nucellus and usually contributing to the formation of the micropyle at the apex.
PO:0020023 outer integument PO:0020021 An integument (PO:0020021) which is one of the two layers of tissue that usually cover the ovule, contiguous to the inner integument and usually involved in forming the micropyle at the apex.
PO:0020024 endothelium PO:0009007 A portion of plant tissue (PO:0009007) which is composed of cells of the inner epidermis of the inner (or only) integument of the ovule that are radially elongated and metabolically very active.
PO:0020026 chalaza PO:0009007 A portion of plant tissue (PO:0009007) that is the region in a plant ovule (PO:0020003) where the integuments (PO:0020021) and the nucellus (PO:0020020) join with the funicule (PO:0020006).
PO:0020027 raphe PO:0025001 A cardinal organ part (PO:0025001) that is a ridge on a plant ovule (PO:0020003) where a funicle (PO:0020006) is or was fused to the ovule.
PO:0020028 antiraphe PO:0025001 A cardinal organ part (PO:0025001) that is the part of a plant ovule (PO:0020003) on the opposite side from a raphe (PO:0020027).
PO:0020029 obturator PO:0009007 A portion of plant tissue (PO:0009007) which is an outgrowth of the funicle, that forms a bridge between the micropyle and other tissues.
PO:0020030 cotyledon PO:0009025 A vascular leaf (PO:0009025) formed at the first shoot node (PO:0005004) of a plant embryo (PO:0009009) or a seedling (PO:0000003).
PO:0020031 radicle PO:0000045 An embryo root (PO:0000045) that is the basal continuation of a hypocotyl (PO:0020100) in a plant embryo (PO:0009009) or a seedling (PO:0000003).
PO:0020032 plumule PO:0000037 The shoot apex (PO:0000037) of the plant embryo (PO:0009009), above the cotyledonary node (PO:0025321).
PO:0020033 coleoptile PO:0009008 A sheath-like plant organ (PO:0009008) that surrounds the plumule (PO:0020032) of a plant embryo (PO:0009009) or the emerging shoot apex (PO:0000037) of a seedling.
PO:0020034 coleorhiza PO:0009008 A sheath-like plant organ (PO:0009008) that surrounds the radicle (PO:0020031) of a plant embryo (PO:0009009) or the emerging root (PO:0009005) of a seedling (PO:0000003).
PO:0020035 epicotyl PO:0020142 The first stem internode (PO:0020142) above the cotyledonary node (PO:0025321) of a plant embryo (PO:0009009) or a seedling (PO:0000003).
PO:0020036 epiblast PO:0009007 A portion of plant tissue (PO:0009007) that is a flap-like projection of the coleorhiza (PO:0020034), inserted opposite the scutellum (PO:0020110).
PO:0020037 mesocotyl PO:0020142 A stem internode (PO:0020142) that is the part of a plant embryo axis (PO:0019018) or a seedling stem (PO:0009047) above the scutellum (PO:0020110) and below the coleoptile (PO:0020033).
PO:0020038 petiole PO:0025066 A stalk (PO:0025066) of a vascular leaf (PO:0009025).
PO:0020039 leaf lamina PO:0025396 A phyllome lamina (PO:0025396) that is the part of a leaf (PO:0025034) exclusive of the petiole (PO:0020038) or leaf sheath (PO:0020104), if either is present.
PO:0020040 leaf base PO:0025140 A phyllome base (PO:0025140) that is part of a leaf (PO:0025034).
PO:0020041 stipule PO:0025001 A cardinal organ part that is an appendage at the base of a vascular leaf.
PO:0020042 simple leaf PO:0009025 A leaf in which the lamina is undivided.
PO:0020043 compound leaf PO:0009025 A leaf having two or more distinct leaflets that are evident as such from early in development.
PO:0020044 hyperphyll PO:0025001 The unifacial terete apical portion of a monocot cotyledon, sometimes also visible on other leaves.
PO:0020045 pinnate leaf PO:0020043 A once-compound leaf with leaflets borne along a rachis.
PO:0020046 palmate leaf PO:0020043 A once-compound leaf divided into several leaflets which arise at the same point, there being no rachis.
PO:0020047 microsporocyte PO:0006204 A sporocyte (PO:0006204) that produces four haploid (1n) microspores (PO:0020048).
PO:0020048 microspore PO:0025017 The smaller, in general, of the two kinds of spores produced after meiosis in the life cycle of a heterosporous plant, and on germination giving rise to the male gametophyte.
PO:0020049 leaflet PO:0025001 A cardinal organ part (PO:0025001) that is one of the ultimate segments of a compound leaf (PO:0020043).
PO:0020050 petiolule PO:0025066 A stalk (PO:0009025) of a leaflet (PO:0020049).
PO:0020051 stipel PO:0025001 Stipule-like appendage(s) at the base of a leaflet (in unifoliolate or simple leaves, found at the top of the petiole).
PO:0020054 bud scale leaf PO:0006003 A scale leaf that surrounds a dormant or perennating bud.
PO:0020055 leaf rachis PO:0025066 A stalk (PO:0025066) that is the main axis of a pinnate or more highly compound leaf, that bears leaflets or divisions of the axis.
PO:0020056 tegmen PO:0009007 That part of the seed coat that develops from the inner integument.
PO:0020057 testa PO:0009007 That part of the seed coat that develops from the outer integument, or from the single integument when there is only one.
PO:0020058 perisperm PO:0009007 A portion of plant tissue (PO:0009007) which is diploid nutritive tissue in an angiosperm seed derived from nucellar tissue.
PO:0020060 caruncle PO:0019022 An arilloid that is an outgrowth of a seed next to the micropyle.
PO:0020061 coma PO:0006048 A portion of seed coat epidermis (PO:0006048) that consists of multiple seed trichomes (PO:0004511) at the seed micropyle (PO:0006334).
PO:0020062 elaiosome PO:0025001 A cardinal organ part that is an oil-secreting outgrowth of a seed or fruit.
PO:0020063 hilum PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is a scar on a seed (PO:0009010) at the place where it was attached to a funicle (PO:0020006).
PO:0020075 mericarp PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) which is one carpellate unit of a schizocarp fruit (PO:0030098) consisting of pericarp (PO:0009084) and one or more seeds (PO:0009010).
PO:0020090 embryo sac central cell PO:0025026 An embryo sac cell (PO:0025026) that is largest cell in a mature embryo sac (PO:0025074).
PO:0020093 antipodal cell PO:0025026 Cell, commonly three in number as in the eight-nucleate embryo sac, located at the other end of the embryo sac from the egg cell.
PO:0020094 plant egg cell PO:0025006 A gamete (PO:0025006) produced by an archegonium (PO:0025126) or an embryo sac (PO:0025074).
PO:0020096 egg apparatus PO:0025001 A cardinal organ part that has as parts an egg cell and two synergids and is located at the micropylar end of the embryo sac.
PO:0020097 generative cell PO:0025525 A spermatogenous cell (PO:0025525) of the microgametophyte (PO:0025280) that divides to produce two pollen sperm cells (PO:0025121).
PO:0020099 microgametophyte vegetative cell PO:0025606 A native plant cell (PO:0025606) that is the larger cell of a microgametophyte (PO:0025280) in seed plants. It does not divide further and develops into a pollen tube cell (PO:0025195).
PO:0020100 hypocotyl PO:0020142 A stem internode (PO:0020142) below the cotyledonary node (PO:0025321) and transitional to a root (PO:0009005) of a plant embryo (PO:0009009) or a seedling (PO:0000003).
PO:0020102 portion of transmitting tissue PO:0025059 A portion of ground tissue (PO:0025059) in the style of a carpel through which a pollen tube grows; it connects a stigma and the inside of an ovary.
PO:0020103 flag leaf PO:0006340 The last mature leaf before the inflorescence in a cereal crop plant.
PO:0020104 leaf sheath PO:0025001 A cardinal organ part (PO:0025001) that is the lower part of a vascular leaf (PO:0009025), and which more or less encases the stem (PO:0009047).
PO:0020105 ligule PO:0025001 A membranous or hairy appendage on the adaxial/upper surface of a leaf, at the junction between sheath and blade, especially in grasses.
PO:0020106 leaf sheath auricle PO:0025001 A cardinal organ part (PO:0025001) that is an ear-shaped outgrowth of the distal part of a leaf sheath (PO:0020104).
PO:0020108 suspensor PO:0025099 An embryonic plant structure at the base of a plant embryo that develops from an embryonic basal cell and connects an embryo proper to the wall of a megagametophyte.
PO:0020109 embryo hypophysis PO:0025028 A native plant cell (PO:0025606) that is the uppermost cell of a suspensor (PO:0020108) and from which part of the root (PO:0009005) and root cap (PO:0020123) in a plant embryo (PO:0009009) of angiosperms are derived.
PO:0020110 scutellum PO:0025099 An embryonic plant structure that is a more or less shield-shaped and absorptive portion of a plant embryo of Poaceae.
PO:0020121 lateral root PO:0009005 A root (PO:0009005) that develops from a lateral root primordium (PO:0000016) that is part of another root on the same plant.
PO:0020122 inflorescence axis PO:0025029 A shoot axis (PO:0025029) that is part of an inflorescence (PO:0009049).
PO:0020123 root cap PO:0025095 A portion of root parenchyma (PO:0025095) tissue that is part of the root tip (PO:0000025) and covers the root apical meristem (PO:0020147).
PO:0020124 root stele PO:0025197 A stele (PO:0025197) that is part of a root (PO:0009005).
PO:0020126 tassel inflorescence PO:0025601 A staminate inflorescence (PO:0025601) in Zea species that bears the tassel spikelet (PO:0006309) on a terminal inflorescence axis (PO:0020122).
PO:0020127 primary root PO:0009005 A root (PO:0009005) that develops directly from a seedling radicle (PO:0020127).
PO:0020128 leaf margin PO:0025018 A phyllome margin (PO:0025018) that is part of a leaf (PO:0025034).
PO:0020130 central root cap PO:0025095 A portion of root parenchyma tissue that is the central part of a root cap in which the cells are arranged in longitudinal files.
PO:0020131 lateral root cap PO:0025095 A portion of root parenchyma tissue that is part of a root cap and is parallel to the sides of a root axis.
PO:0020132 columella root cap cell PO:0025030 Cell that constitutes the central part of the root cap, arranged in longitudinal files.
PO:0020133 columella root cap initial cell PO:0000059 A root initial cell that produces columella cells in the root cap. In direct contact with quiescent center.
PO:0020135 root differentiation zone PO:0025119 A plant axis differentiation zone that is the part of a root and is located behind a root elongation zone.
PO:0020136 ear inflorescence PO:0025598 A pistillate inflorescence (PO:0025598) in Zea species that is highly compacted and bears the ear spikelets (PO:0006320) on a lateral inflorescence axis (PO:0020122).
PO:0020137 leaf apex PO:0025139 A phyllome apex (PO:0025139) that is part of a leaf (PO:0025034).
PO:0020138 leaf lamina vein PO:0025348 A phyllome lamina vein (PO:0025348) that is part of a leaf lamina vascular system (PO:0000048).
PO:0020139 leaf midvein PO:0025413 A primary leaf vein (PO:0025413) that is the central vein of a vascular leaf (PO:0009025).
PO:0020140 secondary leaf vein PO:0020138 A leaf lamina vein (PO:0020138) arising from a primary leaf vein (PO:0025413).
PO:0020141 stem node PO:0005004 A shoot axis node (PO:0005004) that is part of a stem (PO:0009047).
PO:0020142 stem internode PO:0005005 A shoot axis internode (PO:0005005) that is part of a stem (PO:0009047).
PO:0020144 apical meristem PO:0009013 A maximal portion of meristem tissue (PO:0009013) located at a shoot apex (PO:0000037) or root tip (PO:0000025).
PO:0020145 lateral meristem PO:0009013 A portion of meristem (PO:0009013) tissue located parallel to the sides of a shoot axis (PO:0025029) or root (PO:0009005) that participates in lateral growth.
PO:0020147 root apical meristem PO:0006085 A root meristem (PO:0006085) located at the root tip (PO:0000025), behind the root cap (PO:0020123).
PO:0020148 shoot apical meristem PO:0006079 A shoot system meristem (PO:0006079) formed at the apex of the shoot axis (PO:0025029), including those originating from an axillary bud meristem (PO:0000232).
PO:0020149 quiescent center PO:0009013 A portion of meristem tissue (PO:0009013) that is part of a root apical meristem (PO:0020147) and consists of mitotically and metabolically inactive cells and is located behind the protoderm (PO:0006210) of the root (PO:0009005).
PO:0025001 cardinal organ part PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is a proper part of a plant organ (PO:0009008) and includes portions of plant tissue (PO:0009007) of at least two different types.
PO:0025002 basal root PO:0025593 A shoot-borne internode root (PO:0025593) that arises from a part of the hypocotyl (PO:0020100).
PO:0025003 tuber axillary shoot PO:0006343 An axillary shoot that develops from a tuber axillary bud.
PO:0025004 plant axis PO:0009008 An axial plant organ (PO:0009008).
PO:0025005 plant organ margin PO:0025001 A cardinal organ part (PO:0025001) that is the edge of a plant organ (PO:0009008) and the area immediately internally adjacent to it.
PO:0025006 plant gamete PO:0025606 A native plant cell (PO:0025606) that has half the chromosome complement of the sporophyte and is capable of fertilization to create a plant zygote (PO:0000423).
PO:0025007 collective plant organ structure PO:0025497 A collective plant structure (PO:0025497) that is a proper part of a whole plant (PO:0000003), and is composed of two or more adjacent plant organs (PO:0009008) and the associated portions of plant tissue (PO:0009007).
PO:0025008 petal margin PO:0025018 A phyllome margin (PO:0025018) which is part of a petal (PO:0009032).
PO:0025009 leaf lamina margin PO:0020128 A leaf margin (PO:0020128) that is part of a leaf lamina (PO:0020039).
PO:0025010 petiole margin PO:0025001 A cardinal organ part (PO:0025001) that is the edge of a petiole lamina (PO:0025129) and the area immediately internally adjacent to it.
PO:0025011 bract margin PO:0025018 A phyllome margin (PO:0025018) that is part of a bract (PO:0009055).
PO:0025012 cotyledon margin PO:0020128 A leaf margin (PO:0020128) that is part of a cotyledon (PO:0020030).
PO:0025013 prophyll margin PO:0025018 A phyllome margin (PO:0025018) that is part of a prophyll (PO:0009042).
PO:0025014 scale leaf margin PO:0025018 A phyllome margin (PO:0025018) that is part of scale leaf (PO:0006003).
PO:0025015 tepal margin PO:0025018 A phyllome margin (PO:0025018) that is part of a tepal (PO:0009033).
PO:0025016 sporophyll margin PO:0025018 A phyllome margin (PO:0025018) that is part of a sporophyll (PO:0009026).
PO:0025017 plant spore PO:0000003 A whole plant (PO:0000003) that arises through meiosis and is contained in a spore wall.
PO:0025018 phyllome margin PO:0025005 A plant organ margin (PO:0025005) that is part of a phyllome lamina (PO:0025396).
PO:0025019 carpel margin PO:0025016 The margin of a carpel.
PO:0025020 stamen margin PO:0025016 The margin of a stamen.
PO:0025021 collective tepal structure PO:0009058 A perianth (PO:0009058) consisting of one or more tepals (PO:0009033).
PO:0025022 collective leaf structure PO:0025023 A collective phyllome structure (PO:0025023) composed of two or more leaves (PO:0025034).
PO:0025023 collective phyllome structure PO:0025007 A collective plant organ structure (PO:0025007) that consists of two or more phyllomes (PO:0006001) originating from the same node or from one or more adjacent nodes with compressed shoot internodes (PO:0005005).
PO:0025024 branch node PO:0005004 A shoot axis node (PO:0005004) that is part of a branch (PO:0025073).
PO:0025025 root system PO:0025007 A collective plant organ structure (PO:0025007) that produces root meristems (PO:0006085), the plant structures (PO:0009011) that arise from them and the parts thereof.
PO:0025026 embryo sac cell PO:0025606 A native plant cell (PO:0025606) that is part of an embryo sac (PO:0025074).
PO:0025028 embryo plant cell PO:0025099 A native plant cell (PO:0025606) that is part of a plant embryo (PO:0009009).
PO:0025029 shoot axis PO:0025004 A plant axis (PO:0025004) that is part of a shoot system (PO:0009006).
PO:0025030 ground tissue cell PO:0025606 A native plant cell (PO:0025606) that is part of a portion of ground tissue (PO:0025059).
PO:0025031 laticifer cell PO:0025030 A ground tissue cell (PO:0025030) that contains latex.
PO:0025032 hydroid PO:0025606 A native plant cell (PO:0025606) that is dead at maturity, lacks specialized wall thickenings or lignin, and has tapered ends that are thin and partially hydrolyzed.
PO:0025033 leptoid PO:0025606 A native plant cell (PO:0025606) that resembles in structure the sieve elements (PO:0025406) of vascular plants.
PO:0025034 leaf PO:0006001 A phyllome (PO:0006001) that is not associated with a reproductive structure.
PO:0025035 storage parenchyma PO:0005421 A portion of parenchyma (PO:0005421) specialized for carbohydrate storage.
PO:0025036 tuber storage parenchyma PO:0025035 A portion of storage parenchyma (PO:0025035) that is part of a tuber (PO:0025522).
PO:0025037 fruit storage parenchyma PO:0025035 A portion of storage parenchyma that is part of a fruit.
PO:0025038 subterranean tuber storage parenchyma PO:0025036 A portion of tuber storage parenchyma (PO:0025035) that is part of a subterranean tuber (PO:0004547).
PO:0025039 aerial tuber storage parenchyma PO:0025036 A portion of tuber storage parenchyma (PO:0025036) that is part of an aerial tuber (PO:0004548).
PO:0025040 shoot axis tuber axillary vegetative bud PO:0004712 An axillary vegetative bud (PO:0004712) that is part of a shoot axis tuber (PO:0004543).
PO:0025041 aerial tuber axillary vegetative bud PO:0025040 A tuber axillary vegetative bud that is part of an aerial tuber.
PO:0025042 subterranean tuber axillary vegetative bud PO:0025040 A tuber axillary vegetative bud that is part of a subterranean tuber.
PO:0025043 shoot axis tuber periderm PO:0005048 A portion of shoot axis periderm (PO:0005048) that is part of a shoot axis tuber (PO:0004543).
PO:0025044 aerial tuber periderm PO:0025043 A portion of tuber periderm that is part of an aerial tuber.
PO:0025045 subterranean tuber periderm PO:0025043 A portion of tuber periderm that is part of a subterranean tuber.
PO:0025046 shoot axis tuber epidermis PO:0000112 A portion of shoot axis epidermis (PO:0000112) that is part of a shoot axis tuber (PO:0004543).
PO:0025047 aerial tuber epidermis PO:0025046 A portion of tuber epidermis that is part of an aerial tuber.
PO:0025048 subterranean tuber epidermis PO:0025046 A tuber epidermis that is part of a subterranean tuber.
PO:0025049 subterranean tuber interfascicular region PO:0025050 A tuber interfascicular region that is part of a subterranean tuber storage parenchyma.
PO:0025050 tuber interfascicular region PO:0006202 An interfascicular region that is part of a tuber storage parenchyma.
PO:0025051 aerial tuber interfascicular region PO:0025050 A tuber interfascicular region that is part of an aerial tuber storage parenchyma.
PO:0025052 tuber pith PO:0006109 A portion of pith (PO:0006109) that is part of a tuber storage parenchyma (PO:0025036).
PO:0025053 subterranean tuber pith PO:0025052 A portion of tuber pith (PO:0025052) that is part of a subterranean tuber storage parenchyma (PO:0025038).
PO:0025054 aerial tuber pith PO:0025052 A portion of tuber pith (PO:0025052) that is part of an aerial tuber storage parenchyma (PO:0025039).
PO:0025055 tuber cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a tuber storage parenchyma (PO:0025036).
PO:0025056 aerial tuber cortex PO:0025055 A portion of tuber cortex that is part of an aerial tuber storage parenchyma.
PO:0025057 subterranean tuber cortex PO:0025055 A portion of tuber cortex that is part of a subterranean tuber storage parenchyma.
PO:0025058 perimedullary zone PO:0005421 A portion of parenchyma (PO:0005421) that is the outer layer of the pith (PO:0006109).
PO:0025059 portion of ground tissue PO:0009007 Any portion of plant tissue (PO:0009007) other than epidermis (PO:0005679) or vascular tissue (PO:0009015).
PO:0025060 lamina PO:0025498 A cardinal part of multi-tissue plant structure (PO:0025498) that is thin and flat.
PO:0025061 tuber perimedullary zone PO:0025064 A perimedullary zone (PO:0025058) that is part of a tuber pith (PO:0025052).
PO:0025062 aerial tuber perimedullary zone PO:0025061 A tuber perimedullary zone that is part of an aerial tuber pith.
PO:0025063 subterranean tuber perimedullary zone PO:0025061 A tuber perimedullary zone that is part of a subterranean tuber pith.
PO:0025064 shoot axis perimedullary zone PO:0025058 A perimedullary zone (PO:0025058) that is part of a shoot axis pith (PO:0005041).
PO:0025065 root perimedullary zone PO:0025058 A perimedullary zone that is part of a root pith.
PO:0025066 stalk PO:0025001 A cardinal organ part (PO:0025001) that is elongated and sub-cylindrical to cylindrical and supports another cardinal organ part.
PO:0025067 seed storage parenchyma PO:0025035 A portion of storage parenchyma that is part of a seed.
PO:0025068 shoot axis tuber axillary bud meristem PO:0000232 An axillary bud meristem (PO:0000232) that is part of a shoot axis tuber (PO:0004543).
PO:0025069 aerial tuber axillary bud meristem PO:0025068 A tuber axillary bud meristem that is part of an aerial tuber.
PO:0025070 subterranean tuber axillary bud meristem PO:0025068 A tuber axillary bud meristem that is part of a subterranean tuber.
PO:0025071 terminal reproductive bud PO:0004713 A terminal bud that develops into a reproductive structure.
PO:0025072 axillary reproductive bud PO:0004709 An axillary bud (PO:0004709) that develops into an reproductive shoot system (PO:0025082).
PO:0025073 branch PO:0025029 A shoot axis (PO:00025029) that develops from an axillary bud meristem (PO:0000232) or from equal divisions of a meristematic apical cell (PO:0030007).
PO:0025074 embryo sac PO:0025279 A megagametophyte (PO:0025279) that is located in a plant ovary ovule (PO:0025490).
PO:0025075 non-vascular leaf PO:0025034 A leaf (PO:0025034) in a non-vascular plant.
PO:0025076 axillary strobilus bud PO:0025072 An axillary reproductive bud that develops into a strobilus.
PO:0025077 terminal strobilus bud PO:0025071 A terminal reproductive bud that develops into a strobilus.
PO:0025078 placenta PO:0009007 A portion of plant tissue (PO:0009007) at the interface between two plant structures, one of which is in a gametophyte development stage (PO:0028003) and one of which is in a sporophyte development stage (PO:0028002), and that has as parts transfer cells (PO:0000078).
PO:0025079 aerial tuber axillary shoot PO:0025003 An axillary shoot that develops from an aerial tuber axillary bud.
PO:0025080 branch internode PO:0005005 A shoot axis internode (PO:0005005) that is part of a branch (PO:0025073).
PO:0025081 subterranean tuber axillary shoot PO:0025003 An axillary shoot that develops from a subterranean tuber axillary bud.
PO:0025082 reproductive shoot system PO:0009006 A shoot system (PO:0009006) in the sporophytic phase that has as part at least one sporangium (PO:0025094).
PO:0025083 strobilus PO:0025082 A reproductive shoot system (PO:0025082) consisting of a number of sporophylls (PO:0009026) or plant ovule (PO:0020003)-bearing modified leaves (PO:0025034) grouped terminally on a stem (PO:0009047).
PO:0025084 reproductive bud PO:0000055 A bud that develops into a reproductive shoot system.
PO:0025085 strobilus bud PO:0025084 A bud that develops into a strobilus.
PO:0025088 gynoecium ridge PO:0009062 A gynoecium in the early stages of development, characterized as a ridge on the abaxial surface of the floral meristem that develops from a gynoecium primordium.
PO:0025092 dehiscence zone PO:0009007 A portion of plant tissue (PO:0009007) that is part of a plant structure and consists of a narrow band of cells that undergoes dehiscence upon maturation of the structure.
PO:0025093 spore capsule annulus PO:0025092 A dehiscence zone (PO:0025092) that is part of a spore capsule.
PO:0025094 sporangium PO:0009008 A plant organ (PO:0009008) in which plant spores (PO:0025017) are produced.
PO:0025095 root parenchyma PO:0005421 A portion of parenchyma tissue (PO:0005421) that is part of a root (PO:0009005).
PO:0025096 carpel epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a carpel (PO:0009030).
PO:0025097 stamen epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a stamen (PO:0009029).
PO:0025098 bract trichome PO:0025186 A phyllome trichome that is part of a bract epidermis.
PO:0025099 embryo plant structure PO:0009011 A plant structure (PO:0009011) that is part of an plant embryo (PO:0009009).
PO:0025100 shoot axis internode elongation zone PO:0025180 A plant axis elongation zone (PO:0025180) that is part of a shoot axis internode (PO:0005005).
PO:0025101 branch internode elongation zone PO:0025100 A shoot axis internode elongation zone (PO:0025100) that is part of a branch internode (PO:0025080).
PO:0025102 shoot internode differentiation zone PO:0025119 A plant axis differentiation zone that is part of a shoot axis.
PO:0025103 branch internode differentiation zone PO:0025102 A shoot internode differentiation zone that is part of a branch internode.
PO:0025104 first order inflorescence axis PO:0020122 An inflorescence axis (PO:0020122) that is the primary or main axis of an inflorescence (PO:0009049).
PO:0025105 fourth order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a third order inflorescence axis (PO:0025105).
PO:0025106 fifth order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a fourth order inflorescence axis (PO:0025106).
PO:0025107 sixth order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a fifth order inflorescence axis (PO:0025107).
PO:0025108 seventh order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a sixth order inflorescence axis (PO:0025108).
PO:0025109 eighth order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a seventh order inflorescence axis (PO:0025109).
PO:0025110 ninth order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a eighth order inflorescence axis (PO:0025110).
PO:0025111 tenth order inflorescence axis PO:0009081 A higher order inflorescence axis (PO:0009081) that develops from an inflorescence axillary meristem (PO:0009105) of a ninth order inflorescence axis (PO:0025110).
PO:0025112 second order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a first order infructescence axis (PO:0025244) and develops from a second order inflorescence axis (PO:0006321).
PO:0025113 third order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a second order infructescence axis (PO:0025112) and develops from a third order inflorescence axis (PO:0006322).
PO:0025114 fourth order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a third order infructescence axis (PO:0025113) and develops from a fourth order inflorescence axis (PO:0025105).
PO:0025115 fifth order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a fourth order infructescence axis (PO:0025114) and develops from a fifth order inflorescence axis (PO:0025106).
PO:0025116 sixth order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a fifth order infructescence axis (PO:0025115) and develops from a sixth order inflorescence axis (PO:0025107).
PO:0025119 plant axis differentiation zone PO:0025001 A cardinal organ part that is part of a plant axis and is located behind the elongation zone and contains cells that are differentiating into their final form and function.
PO:0025120 antheridium sperm cell PO:0000084 A plant sperm cell (PO:0000084) which develops from a spermatogenous cell (PO:0025525) and is located in an antheridium (PO:0025125).
PO:0025121 pollen sperm cell PO:0000084 A plant sperm cell (PO:0000084) that is part of the pollen (PO:0025281).
PO:0025122 archegonium egg cell PO:0020094 A plant egg cell (PO:0020094) that develops from the archegonium central cell (PO:0025509) and is located in the venter (PO:0030038).
PO:0025123 embryo sac egg cell PO:0020094 A plant egg cell (PO:0020094) that is part of an egg apparatus (PO:0020096).
PO:0025124 multicellular plant gametangium PO:0009008 A plant organ (PO:0009008) that produces one or more gametes (PO:0025006) and participates in the gametophyte development stage (PO:0028003).
PO:0025125 antheridium PO:0025124 A multicellular plant gametangium (PO:0025124) that produces antheridium sperm cells (PO:0025120) and has as parts an antheridium jacket layer (PO:0030053) and an antheridium stalk (PO:0030035).
PO:0025126 archegonium PO:0025124 A multicellular plant gametangium (PO:0025124) that develops from an archegonium initial cell (PO:0025510) and has as parts a venter (PO:0030038) and an archegonium neck (PO:0030039).
PO:0025127 primordium PO:0009013 A portion of meristem tissue (PO:0009013) that has as parts protoderm (PO:0006210) and sub-epidermal meristematic tissue and is committed to the development of a particular plant structure (PO:0009011).
PO:0025128 phyllome primordium PO:0025127 A primordium (PO:0025127) that develops from a phyllome anlagen (PO:0025430) and is part of a shoot apex (PO:0000037) and is committed to the development of a phyllome (PO:0006001).
PO:0025129 petiole lamina PO:0025396 A lamina (PO:0025060) that is part of a petiole (PO:0020038).
PO:0025130 cigar leaf PO:0009025 A leaf near the apex of a stem that is still rolled into a cylinder.
PO:0025134 inflorescence branch crown PO:0009006 A shoot system that forms the basal part of an inflorescence to which the pedicels are attached and in which the internodes do not elongate, giving the appearance of a ridge of raised tissue.
PO:0025135 cigar leaf lamina abaxial epidermis PO:0000049 A portion of leaf lamina abaxial epidermis that covers the abaxial surface of a cigar leaf.
PO:0025136 free tepal PO:0009033 A tepal (PO:0009033) that is part of a collective tepal structure (PO:0025021), along with a fused collective tepal structure (PO:0025138), but is separate from (PATO:0001505) the other tepals.
PO:0025137 fused tepal PO:0009033 A tepal (PO:0009033) that is part of a fused collective tepal structure (PO:0025138) in which it is fused to at least one other tepal.
PO:0025138 fused collective tepal structure PO:0025021 A collective tepal structure (PO:0025021) in which there are at least two fused tepals (PO:0025137).
PO:0025139 phyllome apex PO:0025001 The apical portion of a phyllome.
PO:0025140 phyllome base PO:0025001 The basal part of a phyllome (PO:0006001), where it attaches to a shoot axis (PO:0025029).
PO:0025141 phyllome tip PO:0025001 The apical most portion of a phyllome apex.
PO:0025142 leaf tip PO:0025141 A phyllome tip (PO:0025141) that is part of a leaf apex (PO:0020137).
PO:0025143 tepal apex PO:0025139 A phyllome apex PO:0025139) that is part of a tepal (PO:0009033).
PO:0025144 petal apex PO:0025139 A phyllome apex (PO:0025139) that is part of a petal (PO:0009032).
PO:0025145 sepal apex PO:0025139 A phyllome apex that is part of a sepal.
PO:0025146 petal base PO:0025140 A phyllome base (PO:0025140) that is part of a petal (PO:0009032).
PO:0025147 sepal base PO:0025140 A phyllome base that is part of a sepal.
PO:0025148 tepal base PO:0025140 A phyllome base (PO:0025140) that is part of a tepal (PO:0009033).
PO:0025149 petal tip PO:0025141 A phyllome tip that is part of a petal apex.
PO:0025150 sepal tip PO:0025141 A phyllome tip that is part of a sepal apex.
PO:0025151 tepal tip PO:0025141 A phyllome tip that is part of a tepal apex.
PO:0025152 peduncle epidermis PO:0025179 A portion of branch epidermis that is part of a peduncle.
PO:0025153 peduncle trichome PO:0005003 A shoot axis trichome that is part of a peduncle epidermis.
PO:0025154 bract apex PO:0025139 A phyllome apex (PO:0025139) that is part of a bract (PO:0009055).
PO:0025155 bract base PO:0025140 A phyllome base (PO:0025140) that is part of a bract (PO:0009055).
PO:0025156 bract tip PO:0025141 A phyllome tip that is part of a bract apex.
PO:0025157 phyllome epidermis PO:0006035 A portion of shoot system epidermis (PO:0006035) that is part of a phyllome (PO:0006001).
PO:0025158 bract epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a bract (PO:0009055).
PO:0025159 bract abaxial epidermis PO:0025158 A portion of bract epidermis that covers the abaxial/lower surface of a bract.
PO:0025160 bract adaxial epidermis PO:0025158 A portion of bract epidermis that covers the adaxial/upper surface of a bract.
PO:0025162 multicellular trichome PO:0000282 A portion of plant tissue (PO:0009007) that forms a non-sclerified outgrowth from the epidermis (PO:0005679).
PO:0025163 multicellular trichome branch cell PO:0008030 A trichome cell (PO:0008030) that forms a branch of a multicellular trichome (PO:0025162).
PO:0025164 root epidermal cell PO:0004013 An epidermal cell that is part of a root epidermis.
PO:0025165 shoot epidermal cell PO:0004013 An epidermal cell that is part of a shoot epidermis.
PO:0025166 papilla cell PO:0000332 An epidermal pavement cell with a short protuberance.
PO:0025167 leaf papilla cell PO:0025166 A papilla cell that is part of a leaf epidermis.
PO:0025168 stigma papilla cell PO:0025166 A papilla cell that is part of a stigma epidermis.
PO:0025169 prickle PO:0005679 A portion of epidermis (PO:0005679) that is a sclerified outgrowth.
PO:0025170 root prickle PO:0006036 A prickle (PO:0025169) that is part of a root (PO:0009005)
PO:0025171 shoot axis prickle PO:0000112 A prickle (PO:0025169) that is part of a shoot axis (PO:0025029).
PO:0025172 thorn PO:0025073 A branch that is a sclerified, pointed outgrowth.
PO:0025173 spine leaf PO:0009025 A leaf that is a sclerified and pointed and lacks a lamina.
PO:0025174 spine stipule PO:0020041 A stipule that is sclerified and pointed.
PO:0025175 leaf prickle PO:0006016 A prickle (PO:0025169) that is part of a leaf (PO:0025034).
PO:0025176 stem trichome PO:0005003 A shoot axis trichome that is part of a stem epidermis.
PO:0025177 branch trichome PO:0005003 A shoot axis trichome that is part of a branch epidermis.
PO:0025178 stem epidermis PO:0000112 A portion of shoot axis epidermis (PO:0000112) that is part of a stem (PO:0009047).
PO:0025179 branch epidermis PO:0000112 A portion of shoot axis epidermis (PO:0006035) that is part of a branch (PO:0025073).
PO:0025180 plant axis elongation zone PO:0025001 A cardinal organ part (PO:0025001) which is part of a plant axis (PO:0025004), is located proximal to an apical meristem (PO:0020144), and in which plant cells (PO:0009002) are undergoing longitudinal expansion.
PO:0025181 root elongation zone PO:0025180 A plant axis elongation zone (PO:0025180) that is part of a root tip (PO:0000025) and located proximal to a root apical meristem (PO:0020147).
PO:0025182 sepal trichome PO:0025186 A phyllome trichome that is part of a sepal epidermis.
PO:0025183 leaf stomatal complex PO:0006016 A phyllome stomatal complex (PO:0025215) that is part of a leaf.
PO:0025184 tepal epidermis PO:0025157 A portion of phyllome epidermis (PO:0025157) that is part of a tepal (PO:0009033).
PO:0025185 leaf lamina stomatal complex PO:0000047 A leaf stomatal complex that is part of a leaf lamina.
PO:0025186 phyllome trichome PO:0000282 A trichome that is part of a phyllome epidermis.
PO:0025187 petal trichome PO:0025186 A phyllome trichome that is part of a petal epidermis.
PO:0025188 tepal trichome PO:0025186 A phyllome trichome that is part of a tepal epidermis.
PO:0025189 petiole stomatal complex PO:0000051 A leaf stomatal complex that is part of a petiole.
PO:0025190 leaf abaxial stomatal complex PO:0025183 A leaf stomatal complex (PO:0025183) that is part of a leaf abaxial epidermis (PO:0006019).
PO:0025191 leaf adaxial stomatal complex PO:0025183 A leaf stomatal complex that is part of a leaf adaxial epidermis.
PO:0025192 tepal abaxial epidermis PO:0025184 A portion of tepal epidermis that covers the abaxial/lower surface of a tepal.
PO:0025193 tepal adaxial epidermis PO:0025184 A portion of tepal epidermis that covers the adaxial/upper surface of a tepal.
PO:0025194 root nodule meristem PO:0006085 A root meristem (PO:0006085) that gives rise to a root nodule (PO:0003023).
PO:0025195 pollen tube cell PO:0025606 A native plant cell (PO:0025606) that develops from a microgametophyte vegetative cell (PO:0020099) and forms a tubular extension of the pollen (PO:0025281).
PO:0025196 basal endosperm transfer layer PO:0009007 A portion of plant tissue (PO:0009007) that is part of an endosperm (PO:0009089) and is composed of basal endosperm transfer cells (PO:0009018).
PO:0025197 stele PO:0025001 A cardinal organ part (PO:0025001) that is the central column of a plant axis that consists of the primary vascular tissue and associated ground tissue.
PO:0025198 shoot axis stele PO:0025197 A stele that is part of a shoot axis.
PO:0025199 branch stele PO:0025198 A shoot axis stele that is part of a branch.
PO:0025200 stem stele PO:0025198 A shoot axis stele that is part of a stem.
PO:0025201 megasporangium PO:0025094 A sporangium in which megaspores are produced.
PO:0025202 microsporangium PO:0025094 A sporangium (PO:0025094) in which microspores (PO:0020048) are produced.
PO:0025203 pericarp vascular bundle PO:0005020 A vascular bundle (PO:0005020) that is part of a pericarp (PO:0009084).
PO:0025204 rhizome internode PO:0005005 A shoot axis internode (PO:0005005) that is part of a rhizome (PO:0004542).
PO:0025205 shoot system vascular system PO:0000034 A vascular system (PO:0000034) that is part of a shoot system (PO:0009006).
PO:0025206 phyllome vascular system PO:0000034 A vascular system (PO:0000034) that includes the totality of the portions of vascular tissue in their specific arrangement in a phyllome (PO:0006001).
PO:0025207 tepal vascular system PO:0025206 A phyllome vascular system (PO:0025206) that includes the totality of the portions of vascular tissue in their specific arrangement in a tepal (PO:0009033).
PO:0025208 carpel trichome PO:0025186 A phyllome trichome (PO:0025186) that is part of a carpel epidermis (PO:0025096).
PO:0025209 stamen trichome PO:0025186 A phyllome trichome that is part of a stamen epidermis.
PO:0025210 leaf abaxial trichome PO:0006504 A leaf trichome that is part of a leaf abaxial epidermis.
PO:0025211 leaf adaxial trichome PO:0006504 A leaf trichome that is part of a leaf adaxial epidermis.
PO:0025212 leaf pavement cell PO:0000332 An epidermal pavement cell that is part of a leaf epidermis.
PO:0025213 leaf abaxial pavement cell PO:0025212 A leaf pavement cell that is part of a leaf abaxial epidermis.
PO:0025214 leaf adaxial pavement cell PO:0025212 A leaf pavement cell that is part of a leaf adaxial epidermis.
PO:0025215 phyllome stomatal complex PO:0002000 A stomatal complex (PO:0002000) that is part of a phyllome (PO:0006001).
PO:0025216 bract stomatal complex PO:0025158 A phyllome stomatal complex (PO:0025215) that is part of a bract (PO:0009055).
PO:0025217 carpel stomatal complex PO:0025096 A phyllome stomatal complex that is part of a carpel.
PO:0025218 petal stomatal complex PO:0006041 A phyllome stomatal complex (PO:0025215) that is part of a petal (PO:0009032).
PO:0025219 sepal stomatal complex PO:0006040 A phyllome stomatal complex that is part of a sepal.
PO:0025220 stamen stomatal complex PO:0025097 A phyllome stomatal complex that is part of a stamen.
PO:0025221 tepal stomatal complex PO:0025184 A phyllome stomatal complex that is part of a tepal (PO:0009033).
PO:0025222 reproductive shoot apex PO:0000037 A shoot apex that has as part a reproductive shoot apical meristem.
PO:0025223 vegetative shoot apex PO:0000037 A shoot apex PO:0000037) that has as part a vegetative shoot apical meristem (PO:0008016).
PO:0025227 tetrad of megaspores PO:0009007 A portion of plant tissue consisting of four megaspores that remained joined together shortly after meiosis. One cell will give rise to a female gametophyte.
PO:0025228 valve PO:0025001 A cardinal organ part that is a part of a plant structure that splits apart when the structure dehisces.
PO:0025229 spore capsule valve PO:0025228 A valve that is a part of a spore capsule that splits apart when the spore capsule dehisces.
PO:0025230 columella PO:0009007 A portion of plant tissue (PO:0009007) that forms the central axis of a plant structure such as a fruit (PO:0009001) or moss capsule (sporangium; PO:0025094).
PO:0025231 spore capsule columella PO:0025230 A columella (PO:0025230) that forms the central axis of a spore capsule.
PO:0025233 portion of embryo plant tissue PO:0009007 A portion of plant tissue (PO:0009007) that is part of a plant embryo (PO:0009009).
PO:0025236 phyllome guard cell PO:0000293 A guard cell that is part of a phyllome stomatal complex.
PO:0025237 leaf guard cell PO:0025236 A phyllome guard cell that is part of a leaf stomatal complex.
PO:0025240 second order inflorescence PO:0025082 A reproductive shoot system (PO:0025082) that is part of an inflorescence (PO:0009049) and has as parts a second order inflorescence axis (PO:0006321) and any shoot axes (PO:0025029) and flowers (PO:0009046) that arise from it.
PO:0025241 second order infructescence PO:0025082 A reproductive shoot system that is part of an infructescence and has as parts a second order infructescence axis and any infructescence axes and fruits that arise from it.
PO:0025242 infructescence axis PO:0025029 A shoot axis (PO:0025029) that is part of an infructescence (PO:0006342).
PO:0025243 higher order infructescence axis PO:0025242 An infructescence axis (PO:0025242), which is a branch (PO:0025073) in an infructescence (PO:0006342), that develops from a higher order inflorescence axis (PO:0009081).
PO:0025244 first order infructescence axis PO:0025242 An infructescence axis (PO:0025242), which is the primary or main axis of an infructescence (PO:0006342), that develops from a first order inflorescence axis (PO:0025104).
PO:0025245 persistent sepal PO:0006001 A phyllome that develops from a sepal and remains attached to a fruit at maturity.
PO:0025246 persistent tepal PO:0006001 A phyllome (PO:0006001) that develops from a tepal (PO:0009033) and remains attached to a fruit (PO:0009001) at maturity.
PO:0025247 persistent stamen PO:0006001 A phyllome that develops from a stamen and remains attached to a fruit at maturity.
PO:0025248 pseudostem PO:0025269 A collective organ part structure that forms a cylindrical false stem composed concentric leaf sheaths.
PO:0025249 leaf sheath epidermis PO:0006016 A portion of leaf epidermis that is part of a leaf sheath.
PO:0025250 leaf sheath abaxial epidermis PO:0025249 A portion of leaf sheath epidermis that covers the abaxial/lower surface of a leaf sheath.
PO:0025251 leaf sheath adaxial epidermis PO:0025249 A portion of leaf sheath epidermis that covers the adaxial/upper surface of a leaf sheath.
PO:0025252 seventh order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a sixth order infructescence axis (PO:0025116) and develops from a seventh order inflorescence axis (PO:0025108).
PO:0025253 eighth order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a seventh order infructescence axis (PO:0025252) and develops from an eighth order inflorescence axis (PO:0025109). {comment=NYBG:Brandon_Sinn}
PO:0025254 ninth order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from an eighth order infructescence axis (PO:0025253) and develops from a ninth order inflorescence axis (PO:0025110).
PO:0025255 tenth order infructescence axis PO:0025243 A higher order infructescence axis (PO:0025243) which arises from a ninth order infructescence axis (PO:0025254) and develops from a tenth order inflorescence axis (PO:0025111).
PO:0025256 lateral root elongation zone PO:0025181 A root elongation zone that is part of a lateral root tip.
PO:0025257 primary root elongation zone PO:0025181 A root elongation zone (PO:0025181) that is part of a primary root tip (PO:0000026).
PO:0025258 procambial cell PO:0004010 A meristematic cell (PO:0004010) that is part of a portion of procambium (PO:0025275).
PO:0025259 leaf procambium PO:0025276 A portion of shoot procambium (PO:0025276) tissue that is part of a vascular leaf (PO:0009025).
PO:0025260 shoot axis procambium PO:0025276 A portion of shoot procambium that is part of a shoot apical meristem and gives rise to the primary vascular tissue of a shoot axis.
PO:0025261 pericycle cell PO:0025030 A ground tissue cell that is part of a portion of pericycle.
PO:0025262 plant ovary septum PO:0000030 A septum (PO:0000030) that divides a multilocular plant ovary (PO:0009072).
PO:0025267 fruit replum PO:0004535 A portion of fruit placenta tissue (PO:0004535) that divides a fruit (PO:0009001) into two or more chambers and develops from a plant ovary replum (PO:0025272).
PO:0025268 fruit septum PO:0000030 A septum that divides a cavity or mass of tissue in a fruit and develops from an ovary septum.
PO:0025269 collective organ part structure PO:0025497 A collective plant structure (PO:0025497) composed of two or more cardinal organ parts (PO:0025001) that are part of adjacent plant organs (PO:0009008) and any associated portions of plant tissue (PO:0009007).
PO:0025272 plant ovary replum PO:0020001 A portion of ovary placenta tissue (PO:0020001) which divides a plant ovary (PO:0009072) into two or more chambers, and develops from contact of the placental tissue from opposite sides of the plant ovary early in gynoecium development (GO:0048467).
PO:0025273 stem procambium PO:0025260 A portion of shoot axis procambium gives rise to the primary vascular tissue of a stem.
PO:0025274 branch procambium PO:0025260 A portion of shoot axis procambium gives rise to the primary vascular tissue of a branch.
PO:0025275 procambium PO:0009013 A portion of meristem tissue (PO:0009013) that undergoes differentiation to form the primary vascular tissue (PO:0025408).
PO:0025276 shoot procambium PO:0025275 A portion of procambium (PO:0025275) tissue that is part of a shoot system (PO:0009006).
PO:0025277 pollen sac PO:0025202 A microsporangium that is part of a sporophyll and where the pollen grains develop and are located after they develop.
PO:0025278 rhizome scale leaf PO:0006003 A scale leaf that grows from a rhizome.
PO:0025279 megagametophyte PO:0000003 A whole plant in the gametophyte development stage (PO:0028003) that produces only plant egg cells (PO:0020094).
PO:0025280 microgametophyte PO:0000003 A whole plant (PO:0000003) in the gametophyte development stage (PO:0028003) that produces plant sperm cells (PO:0000084).
PO:0025281 pollen PO:0025280 A microgametophyte (PO:0025280) that develops from a microspore (PO:0020048) is located in a pollen sac (PO:0025277).
PO:0025282 archegonium megagametophyte PO:0025279 A megagametophyte (PO:0025279) that has as parts one or more archegonia (PO:0025126).
PO:0025283 antheridium microgametophyte PO:0025280 A microgametophyte (PO:0025280) that has as parts one or more antheridia (PO:0025125).
PO:0025284 embryo apical cell PO:0025028 A sporophyte meristematic apical cell that is part of a plant embryo and is the uppermost cell formed after the first division of a zygote.
PO:0025285 callus parenchyma cell PO:0000074 A parenchyma cell that is part of a plant callus.
PO:0025286 plant embryo coleoptile PO:0020033 A coleoptile (PO:0020033) that is part of a plant embryo (PO:0009009).
PO:0025287 seedling coleoptile PO:0020033 A coleoptile (PO:0020033) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
PO:0025288 embryo coleorhiza PO:0020034 A coleorhiza (PO:0020034) that is part of a plant embryo (PO:0009009).
PO:0025289 seedling coleorhiza PO:0020034 A coleorhiza (PO:0020034) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
PO:0025290 embryo hypocotyl PO:0020100 A hypocotyl (PO:0020100) that is part of a plant embryo axis (PO:0019018).
PO:0025291 seedling hypocotyl PO:0020100 A hypocotyl (PO:0020100) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
PO:0025292 embryo epicotyl PO:0020035 An epicotyl (PO:0020035) that is part of a plant embryo (PO:0009009).
PO:0025293 seedling epicotyl PO:0020035 An epicotyl (PO:0020035) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
PO:0025294 embryo mesocotyl PO:0020037 A mesocotyl (PO:0020037) that is part of a plant embryo (PO:0009009).
PO:0025295 seedling mesocotyl PO:0020037 A mesocotyl (PO:0020037) that develops from an embryo mesocotyl (PO:0025294).
PO:0025296 plant embryo radicle PO:0020031 A radicle (PO:0020031) that is part of a plant embryo (PO:0009009).
PO:0025297 seedling radicle PO:0020031 A radicle (PO:0020031) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
PO:0025298 fruit operculum PO:0025269 A collective organ part structure that is the apical part of a circumsessile capsular fruit that separates from the rest of the capsule during dehiscence.
PO:0025300 embryo hypocotyl-root junction PO:0004724 A hypocotyl-root junction (PO:0004724) that is part of an plant embryo axis (PO:0019018).
PO:0025301 seedling hypocotyl-root junction PO:0004724 A hypocotyl-root junction (PO:0004724) that develops from an embryo hypocotyl-root junction (PO:0025300) .
PO:0025302 somatic plant embryo PO:0009009 A plant embryo (PO:0009009) that arises from previously differentiated somatic cells, rather than from fused gametes, i.e. the plant zygote (PO:0000423).
PO:0025303 zygotic plant embryo PO:0009009 A plant embryo (PO:0009009) that forms as a result of the fusion of gametes.
PO:0025304 cultured zygote-derived plant embryo PO:0000010 A zygotic plant embryo that is grown or maintained in vitro.
PO:0025305 microspore-derived cultured plant embryo PO:0000011 A cultured somatic plant embryo that develops from isolated microspores.
PO:0025306 sporangium wall PO:0025001 A cardinal organ part (PO:0025001) that is composed of the outer layers of a sporangium (PO:0025094) and bounds the archesporium (PO:0030074) or plant spores (PO:0025017).
PO:0025307 microsporangium wall PO:0025306 A sporangium wall (PO:0025306) that is part of a microsporangium (PO:0025202).
PO:0025308 megasporangium wall PO:0025306 A sporangium wall that is part of a megasporangium.
PO:0025309 microsporangium endothecium PO:0030049 A sporangium wall endothecium (PO:0030049) that is part of a microsporangium wall (PO:0025307).
PO:0025310 megasporangium endothecium PO:0030049 A sporangium wall endothecium (PO:0030049) that is part of a megasporangium wall.
PO:0025311 microsporangium exothecium PO:0030073 An exothecium that is part of a microsporangium wall.
PO:0025312 megasporangium exothecium PO:0030073 An exothecium that is part of a megasporangium wall.
PO:0025313 tapetum PO:0025059 A portion of ground tissue (PO:0025059) that is the inner-most layer of a sporangium wall (PO:0025306).
PO:0025314 microsporangium tapetum PO:0025313 An tapetum (PO:0025313) that is part of a microsporangium wall (PO:0025307).
PO:0025315 megasporangium tapetum PO:0025313 A tapetum (PO:0025313) that is part of a megasporangium wall (PO:0025308).
PO:0025316 axillary hair PO:0025162 A multicellular trichome (PO:0025162) that has as parts a long terminal cell atop a basal stalk and grows in a leaf axil (PO:0009023).
PO:0025317 axillary hair terminal cell PO:0008030 A trichome cell (PO:0008030) that is the long terminal cell of an axillary hair (PO:0008030).
PO:0025318 axillary hair base PO:0009007 A portion of plant tissue (PO:0009007) that is the basal part of an axillary hair (PO:0025316), below the axillary hair terminal cell (PO:0025317).
PO:0025319 axillary hair basal cell PO:0008030 A trichome cell (PO:0008030) that is part of a base of an axillary hair (PO:0025316).
PO:0025320 cotyledonary node rhizoid PO:0030071 An epidermal rhizoid that grows form a cotyledonary node.
PO:0025321 cotyledonary node PO:0020141 A stem node (PO:0020141) from which cotyledons (PO:0020030) may develop.
PO:0025323 flower fascicle PO:0025082 A reproductive shoot system (PO:0025082) that is a second order inflorescence (PO:0025240), or higher, in which the inflorescence branch (PO:0009081) bears two or more flowers (PO:0009046), but is not elongated.
PO:0025324 banner petal PO:0009032 A petal (PO:0009032) that is the top-most petal of a papilionaceous corolla (PO:0009059).
PO:0025325 wing petal PO:0009032 One of two lateral petals (PO:0009032) that is adjacent to the banner petal of a papilionaceous corolla (PO:0009059).
PO:0025326 keel petal PO:0009032 A petal (PO:0009032) that is one of the two lowest petals of a papilionaceous corolla (PO:0025324).
PO:0025327 keel PO:0025023 A boat-shaped collective phyllome structure (PO:0025023) that consists of the two lowest petals (PO:0009032) of a papilionaceous corolla (PO:0009059).
PO:0025328 unifacial vascular leaf PO:0009025 A vascular leaf that has increased activity of either the adaxial or abaxial meristem early in development, leading to absence of the opposite surface on the mature leaf.
PO:0025329 calyptra calyx PO:0025582 A fused calyx (PO:0025582) that is composed of fused sepals (PO:0025584).
PO:0025330 calyptra corolla PO:0025581 A fused corolla (PO:0025581) that is composed of fused petals (PO:0025583).
PO:0025331 ray flower PO:0025599 A small pistillate flower (PO:0025599) on the margin of a head-type (capitulum) inflorescence (PO:0009049).
PO:0025332 disk flower PO:0009046 A small flower (PO:0009046) in the center of a head-type (capitulum) inflorescence (PO:0009049).
PO:0025333 ensiform vascular leaf PO:0025328 A unifacial leaf that is flat in cross section due to a lamina that develops in a median plane (perpendicular to the axis), rather a transverse plane (tangent to the axis) throughout all of part of the length of the leaf.
PO:0025334 terete vascular leaf PO:0025328 A unifacial leaf that is round in cross section throughout all of part of the length of the leaf.
PO:0025335 phyllode leaf PO:0006340 An adult ensiform leaf with a lamina that develops in a median plane, rather a transverse plane, throughout the length of the leaf and is a result of increased activity of the adaxial meristem early in development.
PO:0025336 transition phyllode leaf PO:0008018 A transition vascular leaf in which the basal portion of the leaf has unifacial lamina development in a median plane, similar to a phyllode, and the apical portion of the leaf develops leaflets similar to a juvenile leaf.
PO:0025348 phyllome lamina vein PO:0005020 A vascular bundle (PO:0005020) that is part of a phyllome lamina (PO:0025396).
PO:0025349 awn PO:0025001 A cardinal organ part that is a slender, more or less straight and stiff, fine-pointed, terminal or subterminal appendage of a glume, lemma, or palea.
PO:0025350 palea awn PO:0025349 An awn that is part of a palea.
PO:0025351 glume awn PO:0025349 An awn that is part of a glume.
PO:0025352 tubercle PO:0020040 An enlarged leaf base (PO:0020040) that is fused with adjacent shoot axis (PO:0025029) tissue.
PO:0025353 areole bud PO:0004712 An axillary vegetative bud (PO:0004712) that is not elongated, in which the vascular leaves (PO:0009025) develop as spine leaves (PO:0025173).
PO:0025354 cladode PO:0025029 A shoot axis that is flattened and expanded.
PO:0025355 corm PO:0009006 A shoot system (PO:0009006) that has as parts a short, enlarged stem (PO:0009047) in which the shoot internodes (PO:0005005) do not elongate, and one or more buds (PO:0000055).
PO:0025356 bulb PO:0009006 A short, enlarged shoot system (PO:0009006) that has as parts a short stem (PO:0009047) in which the shoot internodes (PO:0005005) do not elongate, and one or more buds (PO:0000055) enclosed by fleshy leaves (PO:0009025) or leaf bases (PO:0020040).
PO:0025357 pneumatophore PO:0020121 A lateral root (PO:0020121) that is erect and protrudes above the surface of the soil or water.
PO:0025358 pneumatorhiza PO:0020121 A small lateral root that grows from a prop root and has a mealy surface texture.
PO:0025359 sorus PO:0025007 A collective plant organ structure (PO:0025007) on the surface of a vascular leaf (PO:0009025) that has as part a cluster of two or more adjacent sporangia (PO:0025094).
PO:0025360 ceonosorus PO:0025007 A collective plant organ structure (PO:0025007) on the surface of a vascular leaf that has as parts two or more fused sori (PO:0025359).
PO:0025361 leaf tendril PO:0009025 A vascular leaf that is slender and coiling and lacks a lamina.
PO:0025362 leaflet tendril PO:0020049 A leaflet that is slender and coiling and lacks a lamina.
PO:0025363 leaf apex tendril PO:0020137 A leaf apex of a laminar vascular leaf that is slender and coiling.
PO:0025364 branch tendril PO:0025073 A branch that is slender and coiling.
PO:0025365 stem apex tendril PO:0025029 A shoot axis that arises from the apical part of a stem and is slender and coiling.
PO:0025366 leaf rachis tendril PO:0020055 A leaf rachis (PO:0020055) that is slender and coiling and lacks a lamina.
PO:0025367 prophyll tendril PO:0009042 A prophyll that is slender and coiling and lacks a lamina.
PO:0025378 arillode PO:0019022 An arilloid that is an elaborate outgrowth of a seed at the micropylar end.
PO:0025390 free ending veinlet PO:0020138 A leaf lamina vein (PO:0020138) above the first order that is connected to another vein only at one end.
PO:0025391 phyllome lamina areole PO:0025001 A cardinal organ part (PO:0025001) that is part of a phyllome lamina (PO:0025396) and is completely surrounded by phyllome lamina veins (PO:0025348) and cannot be divided into any smaller parts that are completely surrounded by phyllome lamina veins.
PO:0025392 leaf lamina areole PO:0025391 A phyllome lamina areole (PO:0025391) that is part of a leaf lamina (PO:0020039) and is completely surrounded by leaf lamina veins (PO:0020138) and cannot be divided into any smaller parts that are completely surrounded by leaf lamina veins.
PO:0025393 pappus PO:0025269 A collective organ part structure that has a parts one or more pappus elements (scales, awns, or bristles) at the apex of an inferior ovary just beneath or outside the corolla.
PO:0025394 pappus element PO:0025001 A cardinal organ part that is a segment of a pappus.
PO:0025395 floral organ PO:0009008 A plant organ (PO:0009008) that is part of a flower (PO:0009046).
PO:0025396 phyllome lamina PO:0025513 A plant organ lamina (PO:0025513) that is part of a phyllome (PO:0006001).
PO:0025400 phyllome adaxial meristem PO:0009013 A portion of meristem tissue (PO:0009013) that is found on the adaxial side of a developing phyllome (PO:0006001).
PO:0025401 vascular leaf adaxial meristem PO:0025400 A portion of phyllome adaxial meristem (PO:0025400) tissue that is found on the adaxial side of a developing vascular leaf (PO:0009025).
PO:0025402 phyllome abaxial meristem PO:0009013 A portion of meristem tissue (PO:0009013) that is found on the abaxial side of a developing phyllome (PO:0006001).
PO:0025403 vascular leaf abaxial meristem PO:0025402 A portion of phyllome abaxial meristem (PO:0025402) tissue that is found on the abaxial side of a developing vascular leaf (PO:0009025).
PO:0025404 phyllome marginal meristem PO:0009013 A portion of meristem (PO:0009013) tissue that is part of a phyllome margin (PO:0025018) of an expanding phyllome (PO:0006001) and has as parts marginal and submarginal initials.
PO:0025405 leaf marginal meristem PO:0025404 A portion of phyllome marginal meristem (PO:0025404) tissue that is part of a leaf margin (PO:0025009) of a vascular leaf (PO:0009025) during a leaf expansion stage (PO:0001052) and has parts marginal and submarginal initials.
PO:0025406 sieve element PO:0025606 A native plant cell (PO:0025606) that is part of a portion of phloem tissue (PO:0005417), has sieve areas in its walls, and lacks a nucleus in its mature protoplast.
PO:0025407 plant fiber cell PO:0000077 A sclerenchyma cell (PO:0000077) that is elongated and tapering.
PO:0025408 primary vascular tissue PO:0009015 A portion of vascular tissue (PO:0009015) that develops from a procambium (PO:0025275).
PO:0025409 secondary vascular tissue PO:0009015 A portion of vascular tissue (PO:0009015) that develops from a vascular cambium (PO:0005598).
PO:0025410 axial system PO:0025409 A portion of secondary vascular tissue (PO:0025409) that has as parts cells derived from fusiform initials (PO:0000079) and oriented with their longest diameter parallel to a plant axis (PO:0025004).
PO:0025411 ray system PO:0025409 A portion of secondary vascular tissue (PO:0025409) that has as part ray wood parenchyma (PO:0004534) and extends radially in the secondary xylem (PO:0005848) and secondary phloem (PO:0005848) of a plant axis (PO:0025004).
PO:0025412 albuminous cell PO:0000074 A parenchyma cell (PO:0000074) that is morphologically and physiologically associated with a sieve cell (PO:0025415) but does is not derived from the same initial cell (PO:0004011) as the sieve cell.
PO:0025413 primary leaf vein PO:0020138 A leaf lamina vein (PO:0020138) that connects directly to a petiole vascular system (PO:0000052) or a shoot axis vascular system (PO:0000039).
PO:0025414 secondary thickening meristem PO:0020145 A lateral meristem (PO:0020145) that is not contiguous with an apical meristem (PO:0020144) and has a parts multiple layers of meristematic cells (PO:0004010).
PO:0025415 sieve cell PO:0025406 A sieve element (PO:0025406) in which the sieve areas are not aggregated into sieve plates (GO:0097218).
PO:0025416 sieve tube PO:0005417 A portion of phloem tissue (PO:0005417) that has as parts a series of sieve tube elements (PO:0000289) arranged end to end and interconnected through sieve plates.
PO:0025417 xylem vessel PO:0005352 A portion of xylem (PO:0005352) tissue that has as parts a tube-like series of vessel members (PO:0002003), the common walls of which have perforations.
PO:0025418 sclerid cell PO:0000077 A sclerenchyma cell (PO:0000077) with many pits in the secondary cell wall.
PO:0025419 septate fiber tracheid PO:0000355 A fiber tracheid (PO:0000355) that has as parts one or more thin internal partitions or septa.
PO:0025420 septate libriform fiber cell PO:0004520 A libriform fiber cell (PO:0004520) that has as parts one or more thin internal partitions or septa.
PO:0025421 septate phloem fiber cell PO:0004519 A phloem fiber cell (PO:0004519) that has as parts one or more thin internal partitions or septa.
PO:0025422 gelatinous fiber cell PO:0000274 A xylem fiber cell (PO:0000274) in which the inner-most layer of the secondary cell wall (GO:0009531) contains abundant cellulose and is poor in lignin.
PO:0025428 phyllome plate meristem PO:0009013 A portion of meristem (PO:0009013) tissue in which the planes of cell division in each layer are anticlinal to the surface of the phyllome (PO:0006001).
PO:0025429 leaf plate meristem PO:0025428 A phyllome plate meristem (PO:0025428) in the vascular leaf (PO:0009025).
PO:0025430 phyllome anlagen PO:0009013 A portion of meristem tissue (PO:0009013) that is part of a peripheral zone (PO:0000225) of a shoot apical meristem (PO:0020148) and will give rise to a phyllome primordium (PO:0025128).
PO:0025431 vascular leaf anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a vascular leaf primordium (PO:0000017) and is part of a peripheral zone (PO:0000225) of a shoot apical meristem (PO:0020148).
PO:0025432 cotyledon anlagen PO:0025233 A phyllome anlagen (PO:0025430) that will give rise to a cotyledon primordium (PO:0000015) and is part of a peripheral zone (PO:000225) of an embryo shoot apical meristem (PO:0006362).
PO:0025433 root anlagen PO:0009013 A portion of meristem tissue (PO:0009013) that is committed to the development of a root primordium (PO:0005029).
PO:0025434 petiole vascular bundle PO:0005020 A vascular bundle (PO:0005020) that is part of a petiole vascular system (PO:0000052).
PO:0025435 shoot axis cork cambium PO:0005599 A cork cambium (PO:0005599) that is part of a shoot axis (PO:0025029).
PO:0025436 root cork cambium PO:0005599 A cork cambium (PO:0005599) that is part of a root (PO:0009005).
PO:0025437 shoot axis vascular cambium PO:0005598 A vascular cambium (PO:0005598) that is part of a shoot axis (PO:0025029).
PO:0025438 root vascular cambium PO:0005598 A vascular cambium (PO:0005598) that is part of a root (PO:0009005).
PO:0025439 cambial zone PO:0025001 A cardinal organ part (PO:0025001) that is part of a plant axis (PO:0025004) and has as parts a cambium (PO:0005597) and adjacent cells.
PO:0025440 shoot axis cambial zone PO:0025439 A cambial zone that is part of a shoot axis (PO:0025029).
PO:0025441 root cambial zone PO:0025439 A cambial zone that is part of a root (PO:0009005).
PO:0025442 stem secondary thickening meristem PO:0025414 A secondary thickening meristem (PO:0025414) that is part of a stem (PO:0009047).
PO:0025443 root secondary thickening meristem PO:0025414 A secondary thickening meristem (PO:0025414) that is part of a root (PO:0009005).
PO:0025444 primary xylem tracheary element PO:0000290 A tracheary element (PO:0000290) that is part of a primary xylem tissue (PO:0005849).
PO:0025445 secondary xylem tracheary element PO:0000290 A tracheary element (PO:0000290) that is part of a portion of secondary xylem tissue (PO:0005848).
PO:0025446 primary xylem tracheid PO:0000301 A tracheid (PO:0000301) that is part of a xylem tissue (PO:0005849).
PO:0025447 secondary xylem tracheid PO:0000301 A tracheid PO:0000301 that is part of a portion of secondary xylem tissue (PO:0005848).
PO:0025448 primary xylem vessel member PO:0002003 A xylem vessel member (PO:0002003) that is part of a primary xylem tissue (PO:0005849).
PO:0025449 secondary xylem vessel member PO:0002003 A xylem vessel member (PO:0002003) that is part of a portion of secondary xylem tissue (PO:0005848).
PO:0025450 primary xylem vessel PO:0025417 A xylem vessel (PO:0025417) that is part of a primary xylem tissue (PO:0005849).
PO:0025451 secondary xylem vessel PO:0025417 A xylem vessel (PO:0025417) that is part of a portion of secondary xylem tissue (PO:0005848).
PO:0025452 primary phloem sieve element PO:0025406 A sieve element (PO:0025406) that is part of a portion of primary phloem (PO:0006075).
PO:0025453 secondary phloem sieve element PO:0025406 A sieve element (PO:0025406) that is part of a portion of secondary phloem (PO:0005043).
PO:0025454 primary phloem sieve cell PO:0025415 A sieve cell (PO:0025415) that is part of a portion of primary phloem (PO:0006075).
PO:0025455 primary phloem sieve tube element PO:0000289 A sieve tube element (PO:0000289) that is part of a portion of primary phloem (PO:0006075).
PO:0025456 secondary phloem sieve cell PO:0025415 A sieve cell (PO:0025415) that is part of a portion of secondary phloem (PO:0005043).
PO:0025457 secondary phloem sieve tube element PO:0000289 A sieve tube element (PO:0000289) that is part of a portion of secondary phloem (PO:0005043).
PO:0025458 transfer companion cell PO:0000071 A companion cell (PO:0000400) that is a transfer cell (PO:0000078) with many cell wall invaginations.
PO:0025459 ordinary companion cell PO:0000071 A companion cell (PO:0000400) that lacks cell wall invaginations and has few or no plasmodesmata connecting it to adjacent mesophyll cells.
PO:0025460 intermediary companion cell PO:0000071 A companion cell (PO:0000400) that has dense cytoplasm, a small vacuole, proplastids rather than chloroplasts, and abundant and highly branched plasmodesmata linking it to adjacent mesophyll cells.
PO:0025461 early wood tracheary element PO:0025445 A secondary xylem tracheary element (PO:0025445) that is part of a portion of early wood (PO:0004515).
PO:0025462 late wood tracheary element PO:0025445 A secondary xylem tracheary element (PO:0025445) that is part of a portion of late wood (PO:0004516).
PO:0025470 plant embryo cotyledon PO:0020030 A cotyledon (PO:0020030) that is part of a plant embryo (PO:0009009).
PO:0025471 seedling cotyledon PO:0020030 A cotyledon (PO:0020030) that is part of a whole plant (PO:0000003) in the seedling development stage (PO:0007131).
PO:0025472 reaction wood PO:0005848 A portion of secondary xylem (PO:0005848) found on either the upper or lower side of a shoot axis (PO:0025029) that is or was angled away from vertical, with anatomical characteristics that depend on whether it is compression wood (PO:0025473) or tension wood (PO:0025474).
PO:0025473 compression wood PO:0025472 A portion of reaction wood (PO:0025472) found on the lower side of a shoot axis (PO:0025029) that is or was angled away from vertical and that has as parts heavily lignified tracheids (PO:0000301) with a specialized S2 layer that contains more lignin and has a larger (more horizontal) microfibril angle.
PO:0025474 tension wood PO:0025472 A portion of reaction wood (PO:0025472) found on the upper side of a shoot axis (PO:0025029) that is or was angled away from vertical and that has as parts gelatinous fiber cells (PO:0025422).
PO:0025476 tuberous root tuber PO:0009005 A root (PO:0009005) that develops from a tuberous root (PO:0025523) and is further radially enlarged for storage.
PO:0025477 floral organ primordium PO:0025127 A primordium (PO:0025127) that is committed to the development of a floral organ (PO:0025395) and is part of a reproductive shoot apex (PO:0025222).
PO:0025478 androecium primordium PO:0025477 A floral structure primordium (PO:0025477) that is committed to the development of an androecium (PO:0009061).
PO:0025479 basal root primordium PO:0005029 A root primordium (PO:0005029) that is committed to the development of a basal root (PO:0025002).
PO:0025480 shoot-borne root primordium PO:0005029 A root primordium (PO:0005029) that is committed to the development of a shoot-borne root (PO:0000042).
PO:0025481 leaflet primordium PO:0025127 A primordium (PO:0025127) that develops as part of a leaf primordium (PO:0000017) of a compound leaf (PO:0020043) and is committed to the development of a leaflet (PO:0020049).
PO:0025482 bract anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a bract primordium (PO:0025487) and is part of a peripheral zone (PO:000225) of a reproductive shoot apical meristem (PO:0008028).
PO:0025483 lodicule anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a lodicule primordium (PO:0008040) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
PO:0025484 petal anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a petal primordium (PO:0000021) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
PO:0025485 sepal anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a sepal primordium (PO:0004704) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
PO:0025486 stamen anlagen PO:0025430 A phyllome anlagen (PO:0025430) that will give rise to a stamen primordium (PO:0004705) and is part of a peripheral zone (PO:000225) of a flower meristem (PO:0000229).
PO:0025487 bract primordium PO:0025128 A phyllome primordium (PO:0025487) that is committed to the development of a flower bract (PO:0009055).
PO:0025488 flower bract primordium PO:0025477 A bract primordium (PO:0025128) is committed to the development of a flower bract (PO:0009034).
PO:0025489 inflorescence bract primordium PO:0025487 A bract primordium (PO:0025128) is committed to the development of an inflorescence bract (PO:0009054).
PO:0025490 plant ovary ovule PO:0020003 A plant ovule (PO:0020006) that is part of a plant ovary (PO:0009072).
PO:0025491 ovuliferous scale ovule PO:0020003 A plant ovule (PO:0020006) that is part of an ovuliferous scale (add).
PO:0025492 pericyclic lateral root primordium PO:0000016 A lateral root primordium (PO:0000016) that develops from a portion of pericycle tissue (PO:0006203) and is committed to the development of a pericyclic lateral root (PO:0025494).
PO:0025493 non-pericyclic lateral root primordium PO:0000016 A lateral root primordium (PO:0000016) that develops from a portion of plant tissue (PO:0009007) other than a pericycle (PO:0006203) and is committed to the development of a non-pericyclic lateral root (PO:0025495).
PO:0025494 pericyclic lateral root PO:0020121 A lateral root (PO:0025495) that develops from a pericyclic lateral root primordium (PO:0025492).
PO:0025495 non-pericyclic lateral root PO:0020121 A lateral root (PO:0025495) that develops from a non-pericyclic lateral root primordium (PO:0025493).
PO:0025496 multi-tissue plant structure PO:0009011 A plant structure (PO:0009011) that has as parts two or more portions of plant tissue (PO:0009007) of at least two different types and which through specific morphogenetic processes forms a single structural unit demarcated by primarily bona-fide boundaries from other structural units of different types.
PO:0025497 collective plant structure PO:0009011 A plant structure (PO:0009011) that is a proper part of a whole plant (PO:0000003) and includes two or more adjacent plant organs (PO:0009008) or adjacent cardinal organ parts (PO:0025001), along with any associated portions of plant tissue (PO:0009007).
PO:0025498 cardinal part of multi-tissue plant structure PO:0009011 A plant structure (PO:0009011) that is a proper part of a multi-tissue plant structure (PO:0025496) and includes portions of plant tissues (PO:0009007) of at least two different types.
PO:0025499 sepal epidermis giant cell PO:0000332 An epidermal pavement cell (PO:0000332) that is part of sepal epidermis (PO:0006040) and is approximately one fifth the length of a sepal.
PO:0025509 archegonium central cell PO:0025606 A native plant cell (PO:0025606) that is the larger, distal cell arising from the first division of an archegonium initial cell (PO:0025510).
PO:0025510 archegonium initial cell PO:0004011 An initial cell (PO:0004011) that divides asymmetrically to form an archegonium central cell (PO:0025509) and a smaller archegonium neck canal cell (PO:0030035).
PO:0025511 petal spur PO:0025001 A cardinal organ part (PO:0025001) that is a slender, hollow extension of a petal (PO:0009032).
PO:0025512 corolla spur PO:0025269 A collective organ part structure (PO:0025269) that is a slender, hollow extension of a corolla and has as parts segments of two more fused petals.
PO:0025513 plant organ lamina PO:0025001 A lamina (PO:0025060) that is part of a plant organ (PO:0009008).
PO:0025514 phyllome lamina lobe PO:0025001 A cardinal organ part (PO:0025001) that is a projection on a phyllome margin (PO:0025018) for which the corresponding phyllome sinus (PO:0025383) extends one quarter or more of the distance to the center of the long axis of the phyllome lamina (PO:0025396).
PO:0025515 phyllome lamina tooth PO:0025001 A cardinal organ part (PO:0025001) that is an angular projection on a phyllome margin (PO:0025018) for which the corresponding phyllome sinus (PO:0025383) extends less than one quarter of the distance to the center of the long axis of the phyllome lamina (PO:0025396).
PO:0025516 phyllome lamina crena PO:0025001 A cardinal organ part (PO:0025001) that is a rounded projection on a phyllome margin (PO:0025018) for which the corresponding phyllome sinus (PO:0025383) extends less than one quarter of the distance to the center of the long axis of the phyllome lamina (PO:0025396).
PO:0025517 leaf lamina lobe PO:0025514 A phyllome lobe (PO:0025514) that is a projection on a leaf lamina margin (PO:0025009) for which the corresponding leaf sinus (PO:0025384) extends one quarter or more of the distance to the center of the long axis of the leaf lamina (PO:0020039).
PO:0025518 leaf lamina tooth PO:0025515 A phyllome lamina tooth (PO:0025515) that is an angular projection on a leaf margin (PO:0020128) for which the corresponding leaf sinus (PO:0025384) extends less than one quarter of the distance to the center of the long axis of the leaf lamina (PO:0020039).
PO:0025519 leaf lamina crena PO:0025516 A phyllome lamina crena (PO:0025516) that is a rounded projection on a leaf margin (PO:0020128) for which the corresponding leaf sinus (PO:0025384) extends less than one quarter of the distance to the center of the long axis of the leaf lamina (PO:0020039).
PO:0025520 leaf lamina intramarginal vein PO:0020138 A leaf lamina vein (PO:0020138) that is just inside the leaf lamina margin (PO:0025009) and extends from the leaf lamina base (PO:0008019) to the leaf apex (PO:0020137).
PO:0025521 unicellular plant gametangium PO:0025606 A native plant cell (PO:0025606) that produces one or more gametes (PO:0025006) and participates in the gametophyte development stage (PO:0028003).
PO:0025522 tuber PO:0025004 A plant axis (PO:0025004) that is radially enlarged.
PO:0025523 tuberous root PO:0009005 A root (PO:0009005) that is radially enlarged relative to other lateral roots (PO:0020121) or shoot-borne roots (PO:0000042) on the same plant, but not as enlarged as a tuberous root tuber (PO:0025476).
PO:0025524 ventral canal cell PO:0025606 A native plant cell (PO:0025606) that develops from the archegonium central cell (PO:0025509), and lies at the base of the archegonium neck (PO:0030039), above the archegonium egg cell (PO:0025122) in the venter (PO:0030038).
PO:0025525 spermatogenous cell PO:0025606 A native plant cell (PO:0025606) that gives rise to one or more plant sperm cells (PO:0000084).
PO:0025526 body cell PO:0025525 A spermatogenous cell (PO:0025525) of the microgametophyte (PO:0025280) that divides to produce a vegetative cell (PO:0020099) and the pollen sperm cell (PO:0025121).
PO:0025533 prothallial cell PO:0025606 A native plant cell (PO:0025606) which is vegetative and develops from the division of the microspore (PO:0020048) of vascular plants other than angiosperms.
PO:0025534 adventitious shoot axis PO:0025029 A shoot axis (PO:00025029) that develops in an unusual place.
PO:0025535 multicellular trichome tip PO:0009007 A portion of plant tissue (PO:0009007) that is the apical most portion of a multicellular trichome apex (PO:0025551).
PO:0025537 unicellular trichome PO:0000282 A trichome (PO:0000282) that is a single plant cell (PO:0009002).
PO:0025541 bundle sheath cell PO:0025030 A ground tissue cell (PO:0000076) that is part of a bundle sheath (PO:0006023).
PO:0025542 bundle sheath chlorenchyma cell PO:0000076 A chlorenchyma cell (PO:0000076) that is part of a bundle sheath (PO:0006023).
PO:0025543 tapetum cell PO:0025606 A native plant cell (PO:0025606) that is part of the tapetum (PO:0025313).
PO:0025544 microsporangium tapetum cell PO:0025543 A tapetum cell (PO:0025543) that is part of a microsporangium tapetum (PO:0025314).
PO:0025545 anther wall tapetum cell PO:0025544 A microsporangium tapetum cell (PO:0025544) that is part of the anther wall tapetum (PO:0009071).
PO:0025546 accessory paraclade PO:0006321 A second order inflorescence axis (PO:0006321) borne in the same axil (PO:0025224) as an existing second order inflorescence axis.
PO:0025547 cauline paraclade PO:0006321 A second order inflorescence axis (PO:0006321) borne on an elongated first order inflorescence axis (PO:0025104).
PO:0025548 rosette paraclade PO:0006321 A second order inflorescence axis (PO:0006321) borne on a compacted first order inflorescence axis (PO:0025104), forming the rosette.
PO:0025549 trichome tip PO:0009011 A plant structure (PO:0009011) that is the apical most portion of a trichome apex (PO:0025550).
PO:0025550 trichome apex PO:0009011 A plant structure (PO:0009011) that is the apical most portion of a trichome (PO:0000282).
PO:0025551 multicellular trichome apex PO:0025550 A portion of plant tissue (PO:0009007) that is the apical most portion of a multicellular trichome (PO:0025162).
PO:0025552 centarch protoxylem PO:0000272 A portion of protoxylem (PO:0000272) tissue in which the maturation of primary xylem of the shoot system progresses centrifugally with the oldest elements (protoxylem) in the center of the axis.
PO:0025553 mesarch protoxylem PO:0000272 A portion of protoxylem (PO:0000272) tissue in which the maturation of primary xylem (PO:0005849) of the shoot system (PO:0009006) progresses both centripetally and centrifugally from the center.
PO:0025554 exarch protoxylem PO:0000272 A portion of protoxylem (PO:0000272) tissue in which the maturation of primary xylem (PO:0005849) progresses centripetally, the oldest elements (protoxylem) are farthest from the center of the plant axis (PO:0025004).
PO:0025555 root system exarch protoxylem PO:0025554 A portion of exarch protoxylem (PO:002554) tissue in which the maturation of primary xylem (PO:0005849) of the root system (PO:0025025) progresses centripedally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025556 shoot system exarch protoxylem PO:0025554 A portion of exarch protoxylem (PO:002554) tissue in which the maturation of primary xylem (PO:0005849) of the shoot system (PO:0009006) progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025557 endarch protoxylem PO:0000272 A portion of protoxylem (PO:0000272) tissue in which the maturation of primary xylem (PO:0005849) of the shoot system (PO:0009006) progresses centrifugally, with the oldest elements (protoxylem) towards the center of the plant axis (PO:0025004).
PO:0025558 monarch protoxylem PO:0025555 A portion of root exarch protoxylem (PO:0025555) tissue in which the primary xylem (PO:0005849) of the root system (PO:0025025) has only one protoxylem strand or pole, and differentiation progresses centripetally, with the oldest element (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025559 diarch protoxylem PO:0025555 A portion of root exarch protoxylem (PO:0025555) tissue in which the primary xylem (PO:0005849) of the root system (PO:0025025) has two protoxylem strands or poles, and differentiation progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025560 triarch protoxylem PO:0025555 A portion of root exarch protoxylem (PO:0025555) tissue in which the primary xylem (PO:0005849) of the root system (PO:0025025) has three protoxylem strands or poles, and differentiation progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025561 tetrarch protoxylem PO:0025555 A portion of root exarch protoxylem (PO:0025555) tissue in which the primary xylem (PO:0005849) of the root system (PO:0025025) has four protoxylem strands or poles, and differentiation progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025562 pentarch protoxylem PO:0025555 A portion of root exarch protoxylem (PO:0025555) tissue in which the primary xylem (PO:0005849) of the root system (PO:0025025) has five protoxylem strands or poles, and differentiation progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025563 polyarch protoxylem PO:0025555 A portion of root exarch protoxylem (PO:0025555) tissue in which the primary xylem (PO:0005849) of the root system (PO:0025025) has more than five protoxylem strands or poles, and differentiation progresses centripetally, with the oldest elements (protoxylem) farthest from the center of the plant axis (PO:0025004).
PO:0025564 megasporangium tapetum cell PO:0025543 A tapetum cell (PO:0025543) that is part of a megasporangium tapetum (PO:0025315).
PO:0025569 free petal PO:0009032 A petal (PO:0009032) that is part of a perianth (PO:0009058) that contains fused sepals (PO:0025584) and/or fused petals (PO:0025583), but is separate from the other sepals (PO:0009031) and petals (PO:0009032).
PO:0025575 protoxylem tracheary element PO:0025444 A primary xylem tracheary element (PO:0025444) with predominately annular or helical secondary wall thickening that are the first formed tracheary elements (PO:0000290) at a particular location.
PO:0025576 metaxylem tracheary element PO:0025444 A primary xylem tracheary element (PO:0025444) that may have helical, scalariform, reticulate and/or pitted secondary wall thickening.
PO:0025577 epicalyx bract PO:0009034 A flower bract (PO:0009034) that is part of the epicalyx (PO:0009063).
PO:0025580 fused perianth PO:0009058 A perianth (PO:0009058) in which one or more of the petals (PO:0009032), sepals (PO:0009031), and/or tepals (PO:0009033) are fused (PATO:0000642).
PO:0025581 fused corolla PO:0009059 A corolla (PO:0009059) that is composed of fused petals (PO:0025583).
PO:0025582 fused calyx PO:0009060 A calyx (PO:0009060) that is composed of fused sepals (PO:0025584).
PO:0025583 fused petal PO:0009032 A petal (PO:0009032) that is part of a fused corolla (PO:0025581) or a fused perianth (PO:0025580).
PO:0025584 fused sepal PO:0009031 A sepal (PO:0009031) that is part of the fused calyx (PO:0025582) or a fused perianth (PO:0025580).
PO:0025586 phyllome founder cell PO:0025606 A native plant cell (PO:0025606) that is part of the phyllome anlagen (PO:0025430).
PO:0025587 free sepal PO:0009031 A sepal (PO:0009031) that is part of a perianth (PO:0009058) that contains fused sepals (PO:0025584) and/or fused petals (PO:0025583), but is separate from the other sepals (PO:0009031) and petals (PO:0009032).
PO:0025589 leaf lamina tip PO:0025142 A leaf tip (PO:0025142) that is the distal portion of the leaf lamina (PO:0020039).
PO:0025590 receptacle pith PO:0006109 A portion of pith (PO:0006109) that is part of a receptacle (PO:0009064).
PO:0025591 receptacle cortex PO:0005708 A portion of cortex (PO:0005708) that is part of a receptacle (PO:0009064).
PO:0025592 vascular leaf founder cell PO:0025586 A phyllome founder cell (PO:0025586) that is part of a vascular leaf anlagen (PO:0025431).
PO:0025593 shoot-borne internode root PO:0000042 A shoot-borne root (PO:0000042) that arises from a shoot axis internode (PO:0005005).
PO:0025594 ground meristem PO:0009013 A portion of meristem tissue (PO:0009013) that gives rise to a portion of ground tissue (PO:0025059).
PO:0025595 shoot system ground meristem PO:0025594 A ground meristem (PO:0025594) that gives rise to a portion of ground tissue (PO:0025059) in the shoot system (PO:0009006).
PO:0025596 root system ground meristem PO:0025594 A ground meristem (PO:0025594) that gives rise to a portion of ground tissue (PO:0025059) in the root system (PO:0025025).
PO:0025597 ear infructescence PO:0006342 An infructescence (PO:0006342) in Zea species that bears kernels (i.e. caryopsis fruit; PO:0030104) on a compact ear infructescence axis (PO:0025623) and develops from the ear inflorescence (PO:0020136).
PO:0025598 pistillate inflorescence PO:0009049 An inflorescence (PO:0009049) that includes as part only pistillate flowers (PO:0025599).
PO:0025599 pistillate flower PO:0009046 A flower (PO:0009046) that includes as part a single carpel (PO:0009030) or a gynoecium (PO:0009062), but the androecium (PO:0009061) is absent or has aborted during development.
PO:0025600 staminate flower PO:0009046 A flower (PO:0009046) that includes as part an androecium (PO:0009061), and the gynoecium (PO:0009062) is absent or has aborted during development.
PO:0025601 staminate inflorescence PO:0009049 An inflorescence (PO:0009049) that includes as part only staminate flowers (PO:0025600).
PO:0025604 resin cell PO:0004013 An epidermal cell (PO:0004013) that secretes plant resin (PO:0025603), and may line resin canals (PO:0005665) and/or be associated with resin blisters (or cysts).
PO:0025605 fruit pedicel abscission zone PO:0000146 An abscission zone (PO:0000146) that forms as a swelling or joint on a fruit pedicel (PO:0030114).
PO:0025606 native plant cell PO:0009002 A plant cell (PO:0009002) that is either part of a multicellular whole plant (PO:0000003) 'in vivo' or a unicellular organism 'in natura' (i.e. part of a natural environment).
PO:0025607 vegetative shoot system PO:0009006 A shoot system (PO:0009006) that has as parts only vegetative tissues and organs.
PO:0025608 flower pedicel abscission zone PO:0000146 An abscission zone (PO:0000146) that forms as a swelling or joint on a flower pedicel (PO:0030113).
PO:0025609 shoot axis tegument layer PO:0009007 A portion of plant tissue (PO:0009007) that forms a tough, protective outer layer on a shoot axis and includes as parts a shoot axis hypodermis (PO:0005057) and a shoot axis epidermis (PO:0000112).
PO:0025610 stem hypodermis PO:0005057 A portion of hypodermis (PO:0005051) that is part of a stem cortex (PO:0025612).
PO:0025611 stem tegument layer PO:0025609 A portion of shoot axis tegument layer (PO:0025609) that a tough, protective outer layer on a stem (PO:0009047) and includes as parts a stem hypodermis (PO:0025610) and a stem epidermis (PO:0025178).
PO:0025613 spine petiole PO:0020038 A petiole (PO:0020038) that is sclerified and persistent.
PO:0025614 gemma PO:0009007 A portion of plant tissue (PO:0009007) which is a small ball of cells born on a thallus (PO:0030027) and is involved in asexual reproduction.
PO:0025615 rosette PO:0025022 A collective leaf structure (PO:0025022) consisting of a group of rosette leaves (PO:0000014), generally borne at the base of the plant, that are separated by very short stem internodes (PO:0020142).
PO:0025616 lemma apiculus PO:0025001 A cardinal organ part (PO:0025001) which is a short, abrupt, flexible point at the apex of the lemma (PO:0009037).
PO:0025617 carpel abaxial epidermis PO:0025096 A portion of carpel epidermis (PO:0025096) that covers the abaxial surface of a carpel (PO:0009030).
PO:0025618 carpel adaxial epidermis PO:0025096 A portion of carpel epidermis (PO:0025096) that covers the adaxial surface of a carpel (PO:0009030).
PO:0025619 leaf sheath margin PO:0025001 A cardinal organ part (PO:0025001) that is the edge of a laminar portion of a leaf sheath (PO:0020104) and the area immediately internally adjacent to it.
PO:0025620 metaxylem vessel PO:0025450 A primary xylem vessel (PO:0025450) which is part of the metaxylem (PO:0000372).
PO:0025621 metaxylem tracheid PO:0025446 A primary xylem tracheid (PO:0025446) that is part of the metaxylem (PO:0000372).
PO:0025622 metaxylem vessel member PO:0025448 A primary xylem vessel member (PO:0025448) that is part of the metaxylem (PO:0000372).
PO:0025623 ear infructescence axis PO:0025244 A first order infructescence axis (PO:0025244) in an ear infructescence (PO:0025597) that bears kernels (i.e. caryopsis fruit; PO:0030104).
PO:0028004 branch apex PO:0000037 A shoot axis apex (PO:0000037) that is part of a branch (PO:0025073).
PO:0028005 gametophyte coma PO:0025007 A collective plant organ structure (PO:0025007) which is a cluster of gametophore branches (PO:0030021) or non-vascular leaves (PO:0025075) at the top of the gametophore axis (PO:0030020), forming a tuft.
PO:0030001 chloronema cell PO:0000076 A chlorenchyma cell that is part of a chloronema and has cross walls of adjacent cells that are perpendicular to the protonema axis.
PO:0030002 caulonema cell PO:0000076 A chlorenchyma cell that is part of a caulonema and has cross walls of adjacent cells that are oblique to the protonema axis.
PO:0030003 protonema PO:0005426 A portion of chlorenchyma tissue that develops directly from a spore and grows by division of an apical cell to form filaments that are one cell wide and dichotomously branching.
PO:0030004 chloronema PO:0030003 A portion of protonema tissue that consists of only chloronema cells.
PO:0030005 caulonema PO:0030003 A portion of protonema tissue that consists of only caulonema cells.
PO:0030007 meristematic apical cell PO:0004010 A single meristematic cell (PO:0004010) at the tip of a plant structure where apical growth occurs.
PO:0030008 root meristematic apical cell PO:0030015 A sporophyte meristematic apical cell that is part of a root tip.
PO:0030009 shoot meristematic apical cell PO:0030007 A meristematic apical cell that is part of a shoot system.
PO:0030010 shoot axis meristematic apical cell PO:0030009 A shoot meristematic apical cell that is part of a shoot apex.
PO:0030011 leaf meristematic apical cell PO:0030009 A shoot meristematic apical cell that is part of a leaf apex.
PO:0030012 vascular leaf meristematic apical cell PO:0030011 A leaf meristematic apical cell that is part of the leaf apex of a vascular leaf.
PO:0030013 non-vascular leaf meristematic apical cell PO:0030011 A leaf meristematic apical cell (PO:0030011) that is part of a leaf apex of a non-vascular leaf.
PO:0030014 gametophyte meristematic apical cell PO:0030007 An apical cell that is part of a whole plant in the gametophytic phase.
PO:0030015 sporophyte meristematic apical cell PO:0030007 A meristematic apical cell that is part of a whole plant in the sporophytic phase.
PO:0030016 seta meristematic apical cell PO:0030010 A shoot axis meristematic apical cell at the tip of a seta.
PO:0030018 gametophore PO:0009006 A shoot system (PO:0009006) that consists of the shoot axes (PO:0025029) and non-vascular leaves (PO:0025075) of a plant in the gametophyte development stage (PO:0028003) .
PO:0030019 gametophore meristematic apical cell PO:0030009 A shoot meristematic apical cell that is part of a gametophore.
PO:0030020 gametophore axis PO:0025029 A shoot axis (PO:0025029) that is part of a gametophore (PO:0030018).
PO:0030021 gametophore branch PO:0025073 A branch that is part of a gametophore.
PO:0030022 gametophore stem PO:0009047 A stem that is part of a gametophore.
PO:0030023 gametophore axis meristematic apical cell PO:0030010 A shoot axis meristematic apical cell at the tip of a gametophore axis.
PO:0030024 vascular shoot axis meristematic apical cell PO:0030010 A shoot axis meristematic apical cell at the tip of a shoot apex in a shoot system that has as part vascular tissue.
PO:0030025 thallus meristematic apical cell PO:0030014 A gametophyte apical cell that is part of a thallus.
PO:0030026 gametophore bud PO:0000058 A vegetative bud that develops into a gametophore.
PO:0030027 thallus PO:0000003 A whole plant in the gametophytic phase that has a flat growth form and no distinct organs.
PO:0030028 perigonial bract PO:0009055 A bract (PO:0009055) that subtends an antheridium (PO:0025125).
PO:0030029 sporophyte foot PO:0009008 A plant organ that is the base of a whole plant in the sporophytic phase and attaches it to the gametophore.
PO:0030030 perichaetal bract PO:0009055 A bract (PO:0009055) that subtends an archegonium (PO:0025126).
PO:0030031 gametophyte perianth PO:0025023 A collective phyllome structure that consists of two or more of the most distal perichaetal bracts on a gametophore axis and surround a capsule.
PO:0030032 seta PO:0025066 A stalk (PO:0025066) that supports a spore capsule, the sporangium (PO:0025094).
PO:0030033 antheridiophore PO:0025066 A stalk (PO:0025066) that supports an antheridium head (PO:0030075).
PO:0030034 archegoniophore PO:0025066 A stalk (PO:0025066) that supports an archegonium head (PO:0030034).
PO:0030035 antheridium stalk PO:0025066 A stalk (PO:0025066) that is the basal part of an antheridium (PO:0025125).
PO:0030036 archegonium stalk PO:0025066 A stalk (PO:0025066) that the basal part of an archegonium (PO:0025126).
PO:0030037 spore capsule calyptra PO:0025001 A cardinal organ part (PO:0025001) that develops from an archegonium (PO:0025126) and is a cap or hood enclosing the sporangium (syn: spore capsule; PO:0025094).
PO:0030038 venter PO:0025001 A cardinal organ part (PO:0025001) that is the enlarged basal part of an archegonium (PO:0025126) and has an archegonium egg cell (PO:0025122) located in it.
PO:0030039 archegonium neck PO:0025001 A cardinal organ part (PO:0025001) that is the elongated, apical part of an archegonium (PO:0025126).
PO:0030040 sporangium base PO:0025001 A cardinal organ part that is the basal (distal) part of a sporangium.
PO:0030041 sporangium theca PO:0025001 A cardinal organ part that is the main body of a sporangium and has spores located in it.
PO:0030042 peristome PO:0025001 A single or double circle of peristome teeth inside a sporangium mouth.
PO:0030043 peristome tooth PO:0025001 A cardinal organ part that is a single lobe of a peristome.
PO:0030044 spore capsule operculum PO:0025001 A cardinal organ part that is the apical part of a spore capsule that separates from the rest of the capsule during dehiscence.
PO:0030045 stereid PO:0025030 A ground tissue cell with thickened cell walls.
PO:0030046 protonema meristematic apical cell PO:0030014 A gametophyte meristematic apical cell that is part of a protonema.
PO:0030047 hydrome PO:0009007 A portion of plant tissue (PO:0009007) that has as parts hydroid (PO:0025032) cells and cells of no other types.
PO:0030048 leptome PO:0009007 A portion of plant tissue (PO:0009007) that has as parts leptoid (PO:0025033) cells and cells of no other types.
PO:0030049 sporangium wall endothecium PO:0025059 A portion of ground tissue (PO:0025059) that is the sub-epidermal layer of a sporangium wall (PO:0025306).
PO:0030050 stereome PO:0025059 A portion of ground tissue (PO:0025059) that has as parts stereid cells (PO:0030045) and no other cell types.
PO:0030051 central strand PO:0009007 A portion of plant tissue (PO:0009007) that is an axial strand in the center of a gametophore axis (PO:0030020) or seta (PO:0030032) and has as part a hydrome (PO:0030047) or a leptome (PO:0030048).
PO:0030052 antheridium jacket layer cell PO:0025606 A native plant cell (PO:0025606) that is part of an antheridium jacket layer (PO:0030053).
PO:0030053 antheridium jacket layer PO:0009007 A portion of plant tissue (PO:0009007) that is a single layer of cells on the outside of an antheridium (PO:0025125).
PO:0030054 epiphragm PO:0005421 A portion of parenchyma tissue that forms a circular membrane extending from a spore capsule columella and attached to the ends of the peristome teeth that covers a spore capsule mouth.
PO:0030055 pseudopodium PO:0030020 A gametophore axis that is a leafless extension of a gametophore stem or branch on which a sporophyte is borne.
PO:0030056 archesporial cell PO:0025606 A native plant cell (PO:0025606) that divides to gives rise to a sporocyte (PO:0006204) and is part of a sporangium (PO:0025094).
PO:0030057 alar cell PO:0025606 A native plant cell (PO:0025606) located at the base of a non-vascular leaf (PO:0025075) adjacent to where the leaf attaches to the stem (PO:0009047).
PO:0030058 brachycyte PO:0025606 A native plant cell (PO:0025606) that develops from a cell in a protonema (PO:0030003) and has a thick cell wall.
PO:0030059 tmema cell PO:0025606 A native plant cell (PO:0025606) at the base of a gemma (PO:0025614) or adjacent to a brachycyte (PO:0030058) that breaks down to allow abscission of the gemma or brachycyte.
PO:0030060 gametophore axillary hair PO:0025316 An axillary hair that grows in a leaf axil of a non-vascular leaf.
PO:0030061 tmema PO:0009007 A portion of plant tissue (PO:0009007) that has as parts tmema cells (PO:0030059).
PO:0030062 gametophore axillary hair terminal cell PO:0025317 An axillary hair terminal cell that is the long terminal cell of a gametophore axillary hair.
PO:0030063 gametophore axillary hair base PO:0025318 A axillary hair base that is the basal part of a gametophore axillary hair, below the gametophore axillary hair terminal cell.
PO:0030064 gametophore axillary hair basal cell PO:0025319 An axillary hair basal cell that is part of a gametophore axillary hair base.
PO:0030065 archegonium neck canal cell PO:0025606 A native plant cell (PO:0025606) that is one of the axial row of cells in an immature archegonium neck (PO:0030039).
PO:0030067 protonema side branch initial cell PO:0030086 An protonema sub-apical initial that gives rise to a branch of a protonema.
PO:0030068 epidermal rhizoid initial cell PO:0000349 An epidermal initial cell (PO:0000349) that gives rise to an epidermal rhizoid (PO:0030071).
PO:0030069 paraphyllium PO:0000112 A portion of epidermis (PO:0005679) tissue that is an outgrowth from the epidermis between the leaves of a gametophore axis (PO:0030020).
PO:0030070 paraphysis PO:0025162 A slender, usually uniseriate multicellular trichome (PO:0025162) that grows intermixed with the gametangia.
PO:0030071 epidermal rhizoid PO:0030078 A rhizoid (PO:0030078) that develops from an epidermal rhizoid initial cell (PO:0030068).
PO:0030072 costa PO:0009007 A portion of plant tissue (PO:0009007) that is a single or double strand in the center of a non-vascular leaf (PO:0025075) and has as part hydrome (PO:0030047) or leptome (PO:0030048).
PO:0030073 exothecium PO:0005679 A portion of epidermis (PO:0005679) that is the outermost layer of a sporangium wall (PO:0025306).
PO:0030074 archesporium PO:0009007 A portion of plant tissue (PO:0009007) that is the internal part of a sporangium (PO:0025094), bounded by the sporangium wall (PO:0025306), and has as parts archesporial cells (PO:0030056).
PO:0030075 antheridium head PO:0025001 A disk-shaped cardinal organ part (PO:0025001) that is the apical portion of an antheridiophore (PO:0030033) and bears antheridia (PO:0025125).
PO:0030076 archegonium head PO:0025001 An umbrella-shaped cardinal organ part that is the apical portion of an archegoniophore and bears archegonia.
PO:0030077 protonemal side branch rhizoid initial cell PO:0030067 A protonema side branch initial that gives rise to a protonemal rhizoid.
PO:0030078 rhizoid PO:0009011 A plant structure (PO:0009011) that is a uniseriate filament with positive geotropism that grows from an epidermis (PO:0005679) or protonema (PO:0030003).
PO:0030079 protonemal rhizoid PO:0030078 A rhizoid that is part of a protonema and develops from a protonemal side branch rhizoid initial.
PO:0030080 rhizoid meristematic apical cell PO:0030014 A gametophyte meristematic apical cell that is part of a rhizoid.
PO:0030081 caulonema meristematic apical cell PO:0030046 A protonema meristematic apical cell that is part of a caulonema.
PO:0030082 chloronema meristematic apical cell PO:0030046 A protonema meristematic apical cell that is part of a chloronema.
PO:0030083 gametophore bud initial cell PO:0030086 A protonema sub-apical initial hat gives rise to a gametophore bud.
PO:0030084 amphithecium PO:0009007 A portion of plant tissue (PO:0009007) that is the outer layer or layers of a sporangium (PO:0025094) early in sporangium development (GO:0043582).
PO:0030085 protosporangium endothecium PO:0025059 A portion of ground tissue (PO:0025059) that is the tissue internal to an amphithecium early in sporangium development.
PO:0030086 protonema sub-apical initial cell PO:0004011 An initial cell that is produced by longitudinal division of a sub-apical cell of a protonema.
PO:0030087 non-vascular leaf initial cell PO:0004011 An initial cell (PO:0004011) that is part of a gametophore (PO:0030018) and gives rise to a non-vascular leaf (PO:0025075).
PO:0030088 lateral root spine PO:0020121 A lateral root (PO:0020121) that is sclerified and pointed.
PO:0030089 shoot-borne root spine PO:0000042 A shoot-borne root (PO:0000042) that is sclerified and pointed.
PO:0030090 root periderm scar PO:0005047 A portion of root periderm (PO:0005047) formed in response to a disruption of the root epidermis (PO:0006036).
PO:0030091 capsule fruit PO:0009001 A fruit (PO:0009001) which develops from a gynoecium (PO:0009062) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that usually dehisce.
PO:0030092 loculicidal capsule fruit PO:0030091 A capsule fruit (PO:0030091) which at maturity dehisces through fruit locules (PO:0025270).
PO:0030093 septicidal capsule fruit PO:0030091 A capsule fruit (PO:0030091) which dehisces through a fruit septa (PO:0025268).
PO:0030094 coccarium capsule fruit PO:0030091 A capsule fruit (PO:0030091) which at maturity dehisces through both the fruit septa (PO:0025268) and the fruit locules (PO:0025270).
PO:0030095 poricidal capsule fruit PO:0030091 A capsule fruit (PO:0030091) which at maturity dehisces through pores on a pericarp (PO:0009084).
PO:0030096 circumscissile capsule fruit PO:0030091 A capsule fruit (PO:0030091) which at maturity dehisces through the release of a fruit operculum (PO:0025298).
PO:0030097 utricle capsule fruit PO:0030096 A circumscissile capsule fruit (PO:0030096) which at maturity contains one seed (PO:0009010) that is not attached to a pericarp (PO:0009084).
PO:0030098 schizocarp fruit PO:0009001 A fruit (PO:0009001) which develops from a gynoecium (PO:0009062) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that separate into mericarps (PO:0020075).
PO:0030099 samara fruit PO:0009001 A fruit (PO:0009001) which develops from a carpel (PO:0009030) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that are elongated into a wing-like structure.
PO:0030100 legume fruit PO:0009001 A fruit (PO:0009001) which develops from a carpel (PO:0009030) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that dehisce along two fruit valves (PO:0000033).
PO:0030101 loment fruit PO:0030100 A legume fruit (PO:0030100) which at maturity separates into indehiscent, one-seeded segments.
PO:0030102 nut fruit PO:0009001 A fruit (PO:0009001) which develops from a gynoecium (PO:0009062) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that are not fused to a seed coat (PO:0009088).
PO:0030103 drupe fruit PO:0009001 A fruit (PO:0009001) which develops from a carpel (PO:0009030) and at maturity comprises a fleshy exocarp (PO:0009085), fleshy mesocarp (PO:0009087), and a stony endocarp (PO:0009086).
PO:0030104 caryopsis fruit PO:0009001 A fruit (PO:0009001) which develops from a gynoecium (PO:0009062) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that are fused to a seed coat (PO:0009088).
PO:0030105 follicle fruit PO:0009001 A fruit (PO:0009001) which develops from a carpel (PO:0009030) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086) that dehisce along a single fruit valve (PO:0000033).
PO:0030106 silique fruit PO:0009001 A fruit (PO:0009001) which develops from a gynoecium (PO:0009062) and at maturity comprises a dry exocarp (PO:0009085), dry mesocarp (PO:0009087), and dry endocarp (PO:0009086), that dehisce along two fruit valves (PO:0000033) and separate from a persistent fruit replum (PO:0025267).
PO:0030107 achene fruit PO:0009001 A fruit (PO:0009001) which develops from a carpel (PO:0009030) or gyneocium (PO:0009062) and at maturity comprises a dry exocarp (PO:0009085), a dry mesocarp (PO:0009087), and a dry endocarp (PO:0009086) that are connected to a seed coat (PO:0009088) by a funicle (PO:0020006).
PO:0030108 berry fruit PO:0009001 A fruit (PO:0009001) which at maturity comprises a fleshy endocarp (PO:0009086), fleshy mesocarp (PO:0009087), and fleshy exocarp (PO:0009085).
PO:0030109 hesperidium fruit PO:0030108 A berry fruit (PO:0030108) which develops from a superior gynoecium (PO:0009062) and at maturity comprises a thickened exocarp (PO:0009085), thickened mesocarp (PO:0009087), and endocarp (PO:0009086), and has as parts juice sacs (PO:0006013) on a carpel adaxial epidermis (PO:0025618).
PO:0030110 pome fruit PO:0030108 A berry fruit (PO:0030108) which develops from an inferior gynoecium (PO:0009062) and at maturity comprises a fleshy exocarp (PO:0009085), fleshy mesocarp (PO:0009087), and hardened endocarp (PO:0009086) and has as a part a fleshy hypanthium (PO:0009065) which is indistinct from the exocarp (PO:0009085).
PO:0030111 pepo fruit PO:0030108 A berry fruit (PO:0030108) which develops from an inferior carpel (PO:0009030) and at maturity comprises a fleshy exocarp (PO:0009085), fleshy mesocarp (PO:0009087), and fleshy endocarp (PO:0009086), and has as a part a hard receptacle (PO:0009064) which surrounds, and is indistinct from, the exocarp (PO:0009085).
PO:0030112 pedicel PO:0025029 A shoot axis (PO:0025029) that bears only a flower (PO:0009046) or a fruit (PO:0009001).
PO:0030113 flower pedicel PO:0030112 A pedicel (PO:0030112) that bears a flower (PO:0009046).
PO:0030114 fruit pedicel PO:0030112 A pedicel (PO:0030112) that bears a fruit (PO:0009001).
PO:0030115 raceme inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of pedicellate flowers (PO:0009046) on an indeterminate, first order inflorescence axis (PO:0025104).
PO:0030116 compound raceme inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of an indeterminate, first order inflorescence axis (PO:0025104) and pedicellate flowers (PO:0009046) on indeterminate higher order inflorescence axes (PO:0009081).
PO:0030117 spike inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of sessile flowers (PO:0009046) on an indeterminate, first order inflorescence axis (PO:0025104).
PO:0030118 compound spike inflorescence PO:0009049 An inflorescence (PO:0009049), with a monopodial growth habit, which at anthesis is composed of an indeterminate first order inflorescence axis (PO:0025104) and sessile (PATO:0001436) flowers (PO:0009046), or spikelets (PO:0009051), on indeterminate higher order inflorescence axes (PO:0009081).
PO:0030119 catkin inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616) is composed of indeterminate, first order inflorescence axes (PO:0025104) and sessile, unisexual flowers (PO:0009046) that are each subtended by conspicuous inflorescence bracts (PO:0009054).
PO:0030120 spadix inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of sessile flowers (PO:0009046) on a radially-enlarged, indeterminate, first order inflorescence axis (PO:0025104), and a basal, enveloping inflorescence bract (PO:0009054).
PO:0030121 capitulum inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616) is composed of a radially-enlarged, determinate, first order inflorescence axis (PO:0025104) with sessile flowers (PO:0009046).
PO:0030122 compound capitulum inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616) is composed of a radially-enlarged inflorescence axis (PO:0020122), and sessile flowers (PO:0009046) on determinate higher order inflorescence axes (PO:0009081) with basal involucral bracts (PO:0009045). {comment=PO:cooperl}
PO:0030123 panicle inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616) is composed of pedicellate flowers (PO:0009046) or spikelets (PO:0009051) on determinate inflorescence axes (PO:0020122).,
PO:0030124 corymb inflorescence PO:0009049 An inflorescence (PO:0009049) with both monopodial and sympodial growth habits, which at flowering stage (PO:0007616), is composed of a determinate, first order inflorescence axis (PO:0025104), and determinate higher order inflorescence axes (PO:0020122) with pedicellate flowers (PO:0009046) that collectively form a convex plane of flowers.
PO:0030125 anthela inflorescence PO:0009049 An inflorescence (PO:0009049) with both monopodial and sympodial growth habits, which at flowering stage (PO:0007616), is composed of a determinate, first order inflorescence axis (PO:0025104) and determinate, higher order inflorescence axes (PO:0020122) with pedicellate flowers (PO:0009046) that collectively form a concave plane of flowers.
PO:0030126 cyme inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of a determinate, first order inflorescence axis (PO:0025104) and pedicellate flowers (PO:0009046) on paired, determinate higher order inflorescence axes (PO:0009081).
PO:0030127 indeterminate thyrse inflorescence PO:0009049 An inflorescence (PO:0009049) which at flowering stage (PO:0007616), is composed of an indeterminate, first order inflorescence axis (PO:0025104) and dichasial second order inflorescences (PO:0025240) with pedicellate flowers (PO:0009046), and determinate higher order inflorescence axes (PO:0009081).
PO:0030128 determinate thyrse inflorescence PO:0009049 An inflorescence (PO:0009049) which at flowering stage (PO:0007616) is composed of a determinate, first order inflorescence axis (PO:0025104) and dichasial second order inflorescences with pedicellate flowers (PO:0009046) and determinate, higher order inflorescence axes (PO:0009081).
PO:0030129 umbel inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of pedicellate flowers (PO:0009046) on a first order inflorescence axis (PO:0025104) with compressed inflorescence axis internodes (PO:0006326).
PO:0030130 compound umbel inflorescence PO:0009049 An inflorescence (PO:0009049) with a monopodial growth habit, which at flowering stage (PO:0007616), is composed of a first order inflorescence axis (PO:0025104) with compressed inflorescence axis internodes (PO:0006326), and pedicellate flowers (PO:0009046) on higher order inflorescence axes, with compressed inflorescence axis internodes (PO:0006326).
PO:0030131 rhipidium inflorescence PO:0009049 An inflorescence (PO:0009049) with a sympodial growth habit, which at flowering stage (PO:0007616), is composed of determinate inflorescence axes (PO:0020122) that bear pedicellate flowers (PO:0009046) in a single plane, with the latest-developing flowers on the highest order inflorescence axis, found at the center of the inflorescence.
PO:0030132 cincinnus inflorescence PO:0009049 An inflorescence (PO:0009049) with a sympodial growth habit, which at flowering stage (PO:0007616), is composed of determinate inflorescence axes (PO:0020122) with pedicellate flowers (PO:0009046), with the latest-developing flowers on the highest order inflorescence axis.
PO:0030133 compound cincinnus inflorescence PO:0009049 An inflorescence (PO:0009049) with sympodial and monopodial growth habits, which at flowering stage (PO:0007616), is composed of determinate inflorescence axes (PO:0020122) with pedicellate flowers (PO:0009046), with the latest-developing flowers on the highest order inflorescence axes of the second order inflorescences (PO:0025240).
PO:0030134 bostryx inflorescence PO:0009049 An inflorescence (PO:0009049) with a sympodial growth habit, which at flowering stage (PO:0007616), is composed of pedicellate flowers (PO:0009046) on determinate inflorescence axes (PO:0020122), each of which develop at a branch angle of approximately 90 degrees from each higher inflorescence axis (PO:0009081).
PO:0030135 drepanium inflorescence PO:0009049 An inflorescence (PO:0009049) with a sympodial growth habit, which at flowering stage (PO:0007616), is composed of pedicellate flowers (PO:0009046) on determinate inflorescence axes (PO:0020122), each of which develops at progressively more acute angles from each higher inflorescence axis (PO:0009081).
PO:0030136 compound drepanium inflorescence PO:0009049 An inflorescence (PO:0009049) with both sympodial and monopodial growth habits, which at flowering stage (PO:0007616) is composed of pedicellate flowers (PO:0009046) on determinate inflorescence axes (PO:0020122), each of which develops at progressively more acute angles from each higher inflorescence axis (PO:0009081).
PO:0025131 plant anatomical entity An anatomical entity that is or was part of a plant.