ocrea pl. ocreae var. ochrea |
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STRUCTURE |
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A tubular sheath that encircles a stem at a node, subtending a petiole; thought to have arisen evolutionarily by lateral fusion of two stipules; in Polygonaceae. |
terete |
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solid shape |
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Elongate and transversely round, gradually attenuate from base to apex; attenuate-cylindric or attenuate-tubular, broadest at the base. See also obterete. |
chartaceous |
= papery, papyraceous |
texture |
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Very thin, flexible, and readily torn; like paper. See also membranaceous (membranous), pergamentaceous (parchment-like). |
hirtellous |
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pubescence |
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Finely hirsute. |
duration |
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CHARACTER |
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Extent of lifetime, or persistence and physical state after maturation. |
epicarp |
= exocarp |
STRUCTURE |
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The outermost tissue layer of a pericarp. |
taproot |
< primary root |
STRUCTURE |
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A primary root that remains dominant through the life of the plant as the main axis of a vertically oriented system that penetrates the substrate to a considerable depth. |
tuberoid (root-stem) |
= dropper |
STRUCTURE |
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An axial outgrowth that descends from a bulb and eventually forms a new bulb; esp. in Orchidaceae. |
funiculus pl. funiculi |
= funicle; < stalk |
STRUCTURE |
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A stalk that attaches an ovule to a placenta of the ovary wall. |
declinate |
= inclinate |
orientation |
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Bent or curved downward or forward. |
barbate |
= bearded |
pubescence |
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Having one or more limited sectors bearing fairly long, erect, flexible, capillary trichomes. |
female cone |
= macrostrobilus (not recommended), megastrobilus |
STRUCTURE |
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A cone (strobilus) whose fertile organs are all megasporophylls. |
prolate |
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solid shape |
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Symmetrically elongate parallel to the developmental or polar axis. |
bursicle |
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STRUCTURE |
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A pouch- or flap-like protrusion from the stigma that encloses the caudicle of a pollinium. |
cordiform |
= heart-shaped |
solid shape |
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Having two rounded basal lobes, broadest near the base and fairly regularly attenuate to an essentially angular apex; like the stylized form of a heart. See also obcordiform. |
obcordate |
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plane shape |
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Inversely cordate (heart-shaped). |
adaxial |
= ventral (not recommended) |
position |
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On or pertaining to the side or portion of a lateral structure that faces (or would face) toward the bearing axis when (or if) the axis of the lateral structure is (or were) oriented in the same general direction as the bearing axis. |
catadromous |
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venation |
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Having the first lateral vein in each pinna or primary segment of the frond arise from its midvein on the side toward the base of the frond, the pinnule or secondary segment that it leads to often disproportionately larger than the next distal ones. |
lumen pl. lumina |
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FEATURE |
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A space enclosed by the wall(s) or membrane(s) of a structure. |
…morphic |
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architecture |
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Existing within the taxon in the number of distinct structural states indicated by the prefix, the states segregated in different sets of plants or not; as in monomorphic, polymorphic, trimorphic. |
seed leaf |
= cotyledon |
STRUCTURE |
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Any of the one or more primary foliar structures of an embryonic seed plant, proximal to all succeeding leaf primordia; sometimes serving as a storage organ for food reserves in the seed, as in peas and beans. |
helical 1 |
= acyclic, spiral |
arrangement |
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Disposed helically about and along the axis, each on a different radius than the one(s) vertically adjacent. |
distichous |
= two-ranked |
arrangement |
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Disposed in two ranks along the axis, the ranks opposite one another. |
elater 1 |
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STRUCTURE |
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An elongate cell with a helical, hygroscopic thickening in its wall, contained within a sporangium, expanding and contracting with changes in humidity and aiding dispersal of the spores; esp. in Hepaticae. |
gynostegium pl. gynostegia |
< corona |
STRUCTURE |
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An androecial corona, typically consisting of distinct hood- and/or horn-shaped enations that rise above the anthers; esp. in Asclepiadaceae. |