rachilla of pedicellate spikelet of ear [
PO:0006435; plant anatomy term ]
The axis of the ear pedicellate spikelet, above the glumes.
More Synonyms: 雌穂(花)の有柄小穂の小軸 (Japanese), raquilla de la espiguilla pedicelada de la espiga (Spanish)
Comments:
rachilla of pedicellate spikelet of tassel [
PO:0006390; plant anatomy term ]
The axis of the tassel pedicellate spikelet, above the glumes.
More Synonyms: 雄穂(花)の有柄小穂の花序軸 (Japanese), raquilla de la espiguilla pedicelada del penacho (borla) (Spanish)
Comments:
rachilla of sessile spikelet of ear [
PO:0006436; plant anatomy term ]
The axis of the ear sessile spikelet, above the glumes.
More Synonyms: 雌穂(花)の無柄小穂の小軸 (Japanese), raquilla de la espiguilla sésil de la espiga (Spanish)
Comments:
rachilla of sessile spikelet of tassel [
PO:0006389; plant anatomy term ]
The axis of the tassel sessile spikelet, above the glumes.
More Synonyms: 雄穂(花)の無柄小穂の花序軸 (Japanese), raquilla de la espiguilla sésil del penacho (borla) (Spanish)
Comments:
radicle [
PO:0020031; plant anatomy term ]
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).
More Synonyms: radícula (Spanish), 幼根 (Japanese)
Comments: May develop into the primary root (PO:0020127) and eventually the root system (PO:0025025) of an adult plant. Sometimes abortive.
raphe [
PO:0020027; plant anatomy term ]
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.
More Synonyms: 背線、縫線 (Japanese), rafe (Spanish)
Comments: If you are annotating to this structure for an angiosperm, please add an additional annotation to plant ovary ovule (PO:0025490). If you are annotating to this structure for an gymnosperm, please add an additional annotation to ovuliferous scale ovule (PO:0025491).
ray flower [
PO:0025331; plant anatomy term ]
A small pistillate flower (PO:0025599) on the margin of a head-type (capitulum) inflorescence (PO:0009049).
More Synonyms: 舌状花 (Japanese), flor del rayo (Spanish), ray floret
Comments: Found in the Asteraceae, surrounding the disk flowers (PO:0025332). Usually zygomorphic, and different in form from disk flowers. Usually pistillate but sterile.
ray initial cell [
PO:0000082; plant anatomy term ]
A cambial initial cell (PO:0000295) that gives rise to ray cells of the secondary xylem (PO:0005848) and secondary phloem (PO:0005043).
More Synonyms: célula inicial de rayo (Spanish), ray initial, 放射組織始原細胞 (Japanese)
Comments:
ray secondary xylem parenchyma [
PO:0004534; plant anatomy term ]
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).
More Synonyms: parénquima de rayo de la madera (Spanish), ray, ray wood parenchyma, 放射状二次木質部柔組織 (Japanese)
Comments: Occurs in bands or rays of variable width and height that extend radially in the secondary xylem (PO:0005848) and secondary phloem (PO:0005043) of a plant axis (PO:0025004).
ray secondary xylem parenchyma cell [
PO:0004527; plant anatomy term ]
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).
More Synonyms: célula parenquimática de rayo de la madera (Spanish), ray wood parenchyma cell, 放射状二次木部柔組織細胞 (Japanese)
Comments:
ray system [
PO:0025411; plant anatomy term ]
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).
More Synonyms: horizontal system, radial system, ray, 放射状組織 (Japanese)
Comments: May include ray tracheids, as in Pinaceae and some Cupressaceae.
reaction wood [
PO:0025472; plant anatomy term ]
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).
More Synonyms:
Comments: Develops as a response to gravity (either tension or compression) and may function in restoring a stem (PO:0009047) or branch (PO:0025073) that is leaning to its original position. May be either compression wood, found on the lower side of a gymnosperm shoot axis, or tension wood, found on the upper side of an angiosperm shoot axis.
receptacle [
PO:0009064; plant anatomy term ]
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.
More Synonyms: 花床(花托) (Japanese), flower receptacle, receptáculo (Spanish), tori, torus
Comments: The fleshy part of a strawberry develops from a receptacle.
receptacle cortex [
PO:0025591; plant anatomy term ]
A portion of cortex (PO:0005708) that is part of a receptacle (PO:0009064).
More Synonyms:
Comments:
receptacle pith [
PO:0025590; plant anatomy term ]
A portion of pith (PO:0006109) that is part of a receptacle (PO:0009064).
More Synonyms:
Comments:
reproductive bud [
PO:0025084; plant anatomy term ]
A bud that develops into a reproductive shoot system.
More Synonyms: 生殖芽 (Japanese), yema reproductiva (Spanish)
Comments:
reproductive shoot apex [
PO:0025222; plant anatomy term ]
A shoot apex that has as part a reproductive shoot apical meristem.
More Synonyms: ápice reproductivo del epiblasto (epiblastema) (Spanish), 生殖シュート頂、茎頂 (Japanese)
Comments:
reproductive shoot apical meristem [
PO:0008028; plant anatomy term ]
A shoot apical meristem (PO:0020148) that gives rise to the apical growth of reproductive tissues and organs.
More Synonyms: 生殖シュート頂端 分裂組織 (Japanese), meristema apical reproductivo del epiblasto (epiblastema) (Spanish)
Comments:
reproductive shoot system [
PO:0025082; plant anatomy term ]
A shoot system (PO:0009006) in the sporophytic phase that has as part at least one sporangium (PO:0025094).
More Synonyms: 生殖シュート 系、苗条系 (Japanese), sistema de brote reproductivo (Spanish)
Comments:
resin canal [
PO:0005665; plant anatomy term ]
A canal (PO:0025132) of schizogenous origin, lined with secretory resin cells (PO:0025604) and containing plant resin (PO:0025603).
More Synonyms: canal de resina (Spanish), resin duct, 樹脂道 (Japanese)
Comments:
resin cell [
PO:0025604; plant anatomy term ]
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).
More Synonyms:
Comments:
rhizoid [
PO:0030078; plant anatomy term ]
A plant structure (PO:0009011) that is a uniseriate filament with positive geotropism that grows from an epidermis (PO:0005679) or protonema (PO:0030003).
More Synonyms: rizoide (Spanish), 仮根 (Japanese)
Comments: May be unicellular or multicellular. Serves to anchor the plant to the substrate, and may function in nutrient and water uptake. Usually lacks chlorophyll. Includes epidermal rhizoids that grow from the epidermis of bryophytes and pteridophytes in the gametophytic phase or from the stems of some monocots, protonemal rhizoids that branch from a protonema, and rhizoids that develop from a basal cell of a gametophore bud.
rhizoid meristematic apical cell [
PO:0030080; plant anatomy term ]
A gametophyte meristematic apical cell that is part of a rhizoid.
More Synonyms: célula apical meristemática del rizoide (Spanish), rhizoid apical cell, rhizoid apical initial, 仮根分裂頂端細胞 (Japanese)
Comments:
rhizome [
PO:0004542; plant anatomy term ]
A swollen shoot axis (PO:0025029) that grows horizontally at or below the substrate surface and produces shoots above and roots or rhizoids below.
More Synonyms: rizoma (Spanish), rootstock, 根茎=root stock (Japanese)
Comments: In ferns and many monocots, a rhizome is a primary axis (stem), while in other species, it is a branch. Usually produces scale-like leaves.
rhizome internode [
PO:0025204; plant anatomy term ]
A shoot axis internode (PO:0005005) that is part of a rhizome (PO:0004542).
More Synonyms: internodo del rizoma (Spanish), 根茎節間 (Japanese)
Comments:
rhizome scale leaf [
PO:0025278; plant anatomy term ]
A scale leaf that grows from a rhizome.
More Synonyms: hoja escamosa del rizoma (Spanish), 根茎鱗片葉 (Japanese)
Comments:
rib zone [
PO:0000226; plant anatomy term ]
The region of the shoot apical meristem that lies below the central zone and is flanked by the peripheral zone.
More Synonyms: 髄状帯 (Japanese), file meristem, zona de costilla (Spanish)
Comments:
root [
PO:0009005; plant anatomy term ]
A plant axis (PO:0025004) that lacks shoot axis nodes (PO:0005004), grows indeterminately, and is usually positively geotropic.
More Synonyms: aerial root, climbing root, PO:0003006, raíz (Spanish), radices, radix, 根 (Japanese)
Comments: Roots function in the absorption of water and inorganic nutrients, anchoring the plant body to the ground, and supporting it, storage of food and nutrients, and vegetative reproduction. The roots of most vascular plant species enter into symbiosis with soil-borne microorganisms. Roots are usually found underground, although there are many exceptions, such as the aerial roots of orchids. Roots often form secondary thickening from the root lateral meristem (PO:0006308). Commonly thought of as one of the three basic parts of the plant body, along with the shoot axis (PO:0025029) and leaves (PO:0025034).
root aerenchyma [
PO:0006213; plant anatomy term ]
Parenchyma tissue containing particularly large intercellular spaces in the tissue of roots.
More Synonyms: aerénquima de la raíz (Spanish), 根通気組織 (Japanese)
Comments:
root anlagen [
PO:0025433; plant anatomy term ]
A portion of meristem tissue (PO:0009013) that is committed to the development of a root primordium (PO:0005029).
More Synonyms: precursor de raí (Spanish), 根原基 (Japanese)
Comments: Only detectable by gene expression, not morphology. May arise in a pericycle (PO:0006203), as for lateral roots in most seed plants, an endodermis (PO:0000252), as for lateral roots in ferns, or from parenchyma cells (PO:0000074) that are part a shoot axis (PO:0025029), in the case of a basal root (PO:0025002) or shoot-borne root (PO:0000042).
root apical meristem [
PO:0020147; plant anatomy term ]
A root meristem (PO:0006085) located at the root tip (PO:0000025), behind the root cap (PO:0020123).
More Synonyms: meristema apical de la raíz (Spanish), promeristem, RAM, 根端分裂組織 (Japanese)
Comments: In most cases, it is involved in root elongation.
root cambial zone [
PO:0025441; plant anatomy term ]
A cambial zone that is part of a root (PO:0009005).
More Synonyms: zona cambial de la raíz (Spanish), 根形成層 (Japanese)
Comments: Includes a cambium (PO:0005597) and adjacent cells. This term is used when the borders of the cambium are not clear.
root cap [
PO:0020123; plant anatomy term ]
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).
More Synonyms: caliptra de la raíz (Spanish), rootcap, 根冠(=kalyptra) (Japanese)
Comments: Often composed of living and dead parenchyma cells. Protects the root apical meristem.
root cap of lateral root [
PO:0003018; plant anatomy term ]
A root cap that is part of a lateral root tip.
More Synonyms: caliptra de la raíz lateral (Spanish), 側根の根冠 (Japanese)
Comments:
root cap of primary root [
PO:0003017; plant anatomy term ]
A root cap that is part of a primary root tip.
More Synonyms: caliptra de la raíz primary (Spanish), 主根の根冠 (Japanese)
Comments:
root cork cambium [
PO:0025436; plant anatomy term ]
A cork cambium (PO:0005599) that is part of a root (PO:0009005).
More Synonyms: cambium suberígeno de la raíz (Spanish), 根コルク形成層 (Japanese)
Comments:
root cortex [
PO:0000258; plant anatomy term ]
A portion of cortex (PO:0005708) that is part of a root (PO:0009005).
More Synonyms: cortex de la raíz (Spanish), PO:0003010, portion of root cortex tissue, 根皮層 (Japanese)
Comments: In dicots and gymnosperms, the cortex consists of mainly parenchyma cells. In monocots sclerenchyma develops in addition to parenchyma.
root cortex-endodermis initial cell [
PO:0000060; plant anatomy term ]
A root initial cell that produces root cortex and endodermis. In direct contact with quiescent center.
More Synonyms: célula inicial del cortex/endodermis de la raíz (Spanish), root cortex-endodermis initial, root cortex-endodermis stem cell, 根皮層内皮始原細胞 (Japanese)
Comments:
root differentiation zone [
PO:0020135; plant anatomy term ]
A plant axis differentiation zone that is the part of a root and is located behind a root elongation zone.
More Synonyms: PO:0003002, region of root maturation, root maturation zone, root specialization zone, zona de diferenciación de la raíz (Spanish), 根分化帯(層) (Japanese)
Comments: Most of the primary tissues of a root mature in the differentiation zone. This zone is where root hairs are produced.
root elongation zone [
PO:0025181; plant anatomy term ]
A plant axis elongation zone that is part of a root tip and located directly behind the root apical meristem.
More Synonyms: zona de elongación de la raíz (Spanish), 根伸長帯(層) (Japanese)
Comments: The root elongation zone is only a few millimeters in length and is the only portion of the root in which cell elongation generally occurs. Root hairs are not yet produced in this region. Primary root tissues begin to differentiate in the root elongation zone. This term replaces elongation zone (PO:0020125).
root endodermis [
PO:0005059; plant anatomy term ]
A portion of endodermis that is part of a root cortex.
More Synonyms: endodermis de la raíz (Spanish), 根内皮 (Japanese)
Comments:
root epidermal cell [
PO:0025164; plant anatomy term ]
An epidermal cell that is part of a root epidermis.
More Synonyms: célula epidérmica de la raíz (Spanish), 根表皮細胞 (Japanese)
Comments:
root epidermis [
PO:0006036; plant anatomy term ]
A portion of epidermis that is part of a root system.
More Synonyms: epiblem, epidermis de la raíz (Spanish), PO:0006037, rhizodermis, 根表皮 (Japanese)
Comments: The root epidermis is different from the shoot epidermis in its origin, function and structure.
root giant cell [
PO:0005026; plant anatomy term ]
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.
More Synonyms: célula gigante de la raíz (Spanish), 根巨大細胞 (Japanese)
Comments:
root hair cell [
PO:0000256; plant anatomy term ]
A root epidermal cell (PO:0025164) that develops from a trichoblast (PO:0000262) and has as part a root hair (GO:0035618).
More Synonyms: célula del pelo de la raíz (Spanish), 根毛細胞 (Japanese)
Comments: Compare with non-hair root epidermal cell (PO:0000263). This term is for an entire epidermal cell that contains a root hair extension. To describe only the cell extension, see root hair (GO:0035618) or root hair tip (GO:0035619).
root initial cell [
PO:0000059; plant anatomy term ]
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.
More Synonyms: célula inicial de la raíz (Spanish), root initial, root stem cell, 根始原細胞 (Japanese)
Comments:
root lateral meristem [
PO:0006308; plant anatomy term ]
A lateral meristem (PO:0020145) that is part of a root (PO:0009005).
More Synonyms: meristema lateral de la raíz (Spanish), root lateral growth meristem, 根側部分裂組織 (Japanese)
Comments: Not to be confused with lateral root apical meristem (PO:0006020), which is an apical meristem (PO:0020144) of a lateral root (PO:0020121).
root meristem [
PO:0006085; plant anatomy term ]
A portion of meristem tissue (PO:0009013) that gives rise to a root (PO:0009005).
More Synonyms: meristema de la raíz (Spanish), meristematic zone, PO:0003001, 根分裂組織 (Japanese)
Comments:
root meristematic apical cell [
PO:0030008; plant anatomy term ]
A sporophyte meristematic apical cell that is part of a root tip.
More Synonyms: célula apical de la raíz (Spanish), root apical cell, root apical initial, 根分裂組織の頂端細胞 (Japanese)
Comments: Occurs in the sporophytic phase of pteridophytes.
root nodule [
PO:0003023; plant anatomy term ]
A cardinal organ part (PO:0025001) that is an outgrowth of a root (PO:0009005) and is inhabited by nitrogen-fixing bacteria.
More Synonyms: nódulo de la raíz (Spanish), nodule, 根粒 (Japanese)
Comments: Root nodules are a symbiosis between a plant (often, but not exclusively, of the Fabaceae) and bacteria of the genus Rhizobium, Bradyrhizobium, or Azorhizobium.
root nodule meristem [
PO:0025194; plant anatomy term ]
A root meristem (PO:0006085) that gives rise to a root nodule (PO:0003023).
More Synonyms: meristema del nódulo de la raíz (Spanish), 根粒分裂組織 (Japanese)
Comments:
root parenchyma [
PO:0025095; plant anatomy term ]
A portion of parenchyma tissue (PO:0005421) that is part of a root (PO:0009005).
More Synonyms: parénquima de la raíz (Spanish), 根柔組織 (Japanese)
Comments:
root periderm [
PO:0005047; plant anatomy term ]
A portion of periderm that is part of a root.
More Synonyms: peridermis de la raíz (Spanish), 根周皮 (Japanese)
Comments:
root perimedullary zone [
PO:0025065; plant anatomy term ]
A perimedullary zone that is part of a root pith.
More Synonyms: zona perimedular de la raíz (Spanish), 根髄冠 (Japanese)
Comments:
root pith [
PO:0005040; plant anatomy term ]
A portion of pith (PO:0006109) that is part of a root stele (PO:0020124).
More Synonyms: médula de la raíz (Spanish), 根髄 (Japanese)
Comments:
root prickle [
PO:0025170; plant anatomy term ]
A prickle that is part of a root.
More Synonyms: espinilla de la raíz (Spanish), 根刺状突起 (Japanese)
Comments:
root primordium [
PO:0005029; plant anatomy term ]
A primordium (PO:0025127) that develops from a root anlagen (PO:0025433) and is committed to the development of a root (PO:0009005).
More Synonyms: portion of root primordium tissue, primordio de raíz (Spanish), root primordia, 根原基(可視的) (Japanese)
Comments: A root primordium may arise from cells of a pericycle (PO:0006203) in a root in most seed plant (pericyclic lateral root primordium; PO:0025492), from cells of an endodermis (PO:0000252) in ferns and some seed plants (non-pericyclic lateral root primordium: PO:0025493), or from cells of a shoot axis (PO:0025029), in the case of a basal root primordium (PO:0025479) or shoot-borne root primordium (PO:0025480). Transition from root primordium to root occurs with the formation of a root cap (PO:0020123), shortly after the development of a root apical meristem (PO:0020147).
root procambium [
PO:0006307; plant anatomy term ]
A portion of procambium (PO:0025275) tissue that undergoes differentiation to form the primary vascular tissue (PO:0025408) of a root (PO:0009005).
More Synonyms: procambium de la raíz (Spanish), 根前形成層 (Japanese)
Comments: A derivative of the root apical meristem.
root secondary thickening meristem [
PO:0025443; plant anatomy term ]
A secondary thickening meristem (PO:0025414) that is part of a root (PO:0009005).
More Synonyms: meristema de engrosamiento secundario de la raíz (Spanish), 根二次肥厚分裂組織 (Japanese)
Comments:
root stele [
PO:0020124; plant anatomy term ]
A stele (PO:0025197) that is part of a root (PO:0009005).
More Synonyms: estela de la raíz (Spanish), PO:0003012, root vascular cylinder, 根中心柱 (Japanese)
Comments: Includes the pericycle as the outermost layer of the stele.
root syncytium cell [
PO:0005027; plant anatomy term ]
Multinucleate cell developed by a series of events involving fusion with the neighboring dividing cells. The events are induced by cyst nematodes (e.g.
Heterodera schachtii) entering the feeding cells (any cells) of the root vascular system.
More Synonyms: célula ??? de la raíz (Spanish), 根融合細胞 (Japanese)
Comments:
root system [
PO:0025025; plant anatomy term ]
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.
More Synonyms: root, sistema de raíz (Spanish), 根系 (Japanese)
Comments: Generally the below ground portion of a vascular plant.
root system exarch protoxylem [
PO:0025555; plant anatomy term ]
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).
More Synonyms: protoxilema exarco de la raiz (Spanish), 根外原型原生木部 (Japanese)
Comments:
root system ground meristem [
PO:0025596; plant anatomy term ]
A ground meristem (PO:0025594) that gives rise to a portion of ground tissue (PO:0025059) in the root system (PO:0025025).
More Synonyms:
Comments:
root system phloem sap [
PO:0025567; plant anatomy term ]
A phloem sap (PO:0025540) that is located in the root system (PO:0025025).
More Synonyms: savia del floema del sistema de la raiz (Spanish), 根組織師管液 (Japanese)
Comments:
root system xylem sap [
PO:0025568; plant anatomy term ]
A xylem sap (PO:0025539) that is located in the root system (PO:0025025).
More Synonyms: savia del xilema del sistema de la raiz (Spanish), 根組織木部樹液 (Japanese)
Comments:
root tip [
PO:0000025; plant anatomy term ]
The apical most portion of the root (PO:0009005) including the root apical meristem (PO:0020147) and root cap (PO:0020123).
More Synonyms: punta de la raíz (Spanish), 根端 (Japanese)
Comments:
root vascular cambium [
PO:0025438; plant anatomy term ]
A vascular cambium (PO:0005598) that is part of a root (PO:0009005).
More Synonyms: cambium vascular de la raíz (Spanish), 根維管系形成層 (Japanese)
Comments:
root vascular system [
PO:0003011; plant anatomy term ]
A vascular system that includes the totality of the portions of vascular tissue in their specific arrangement in a root.
More Synonyms: root vein, sistema vascular de la raíz (Spanish), 根維管系 (Japanese)
Comments: This term was brought back from OBSOLETE node (original reason for OBSOLETE: synonym of term stele). Since stele encompasses both vascular system and the pith, in roots with pith, vascular system and stele are not synonymous.
root-borne shoot system [
PO:0004544; plant anatomy term ]
A shoot system that is initiated from a root.
More Synonyms: sistema de epiblasto (epiblastema) que nace en la raíz (Spanish), sucker, sucker shoot, turion, 根由来苗条系 (Japanese)
Comments:
root-derived cultured plant cell [
PO:0000008; plant anatomy term ]
A cultured plant cell that was derived from root tissue.
More Synonyms: célula cultivada de raíz (Spanish), root-derived cultured cell, 根由来植物培養細胞 (Japanese)
Comments: May be derived from cultured plant callus or plant protoplasts induced from a segment of root. In the case of the plant protoplast, after the re-establishment plant cell walls.
rosette [
PO:0025615; plant anatomy term ]
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).
More Synonyms:
Comments:
rosette leaf [
PO:0000014; plant anatomy term ]
A vascular leaf (PO:0009025) born in a circular pattern around a stem (PO:0009047) with compressed stem internodes (PO:0020142).
More Synonyms: ロゼット葉 (Japanese), hoja en roseta (Spanish)
Comments: Arabidopsis, vegetative development is characterized by the production of the rosette leaves.
rosette paraclade [
PO:0025548; plant anatomy term ]
A primary inflorescence branch (PO:0006321) borne on the compacted first order inflorescence axis (PO:0025104), forming the rosette.
More Synonyms: ロゼット側生分枝 (Japanese), paraclado en roseta (Spanish)
Comments: