rachilla 2 var. rhachilla |
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STRUCTURE |
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A second-order axis in an inflorescence, especially the axis bearing the florets in a spikelet; esp. in Cyperaceae, Poaceae (Gramineae). |
bristle 2 |
= seta; > glochid, glochidium; < trichome |
STRUCTURE |
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A trichome that is elongate, more or less straight, terete, fine-pointed, and stiff. |
distichous |
= two-ranked |
arrangement |
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Disposed in two ranks along the axis, the ranks opposite one another. |
geniculate |
= kneed |
solid shape |
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Elongate, abruptly bent, somewhat thicker at the angle, and appearing as though articulate like a leg at the knee. |
macrospore (not recommended) |
= megaspore |
STRUCTURE |
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A female spore; a spore of the larger of two types produced by the sporophytes of a heterosporous taxon; produced in a megasporangium; giving rise upon germination to a megagametophyte. |
cuculliform |
= cucullate, hood-shaped |
solid shape |
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Convex or compressed-convex overall with a distal peak or ridge, relatively thin-walled and essentially hollow with the interior open to one side below the distal portion; resembling a hood or cowl. See also galeiform (galeate, helmet-shaped), which overlaps conceptually. |
floating 2 |
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location |
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At or upon the surface of water. |
ventral (not recommended) |
= adaxial |
insertion |
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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. |
filamentous |
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texture |
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Composed of filiform (thread-like) strands with no intervening tissue. |
stellate 3 |
= star-shaped |
solid shape |
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Having a distal aspect like the stylized shape of a star; stipitate or sessile with elongate branches or appendages radiating widely in three dimensions from a common point at the apex of the proximal axis or, when sessile, upon the bearing surface. |
seedling |
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PLANT |
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A plant in the first stages of its growth following emergence from the seed. |
erose 2 |
= eroded |
relief |
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Appearing as if chewed or gnawed; having very irregular localized deviations from its generalized line. |
planoconcave |
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solid shape |
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Relatively thin with opposite broad faces, one plane and one concave. |
parted |
? cleft, dissected, divided, lobate, lobed, partite, segmented |
solid shape |
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Having two or more component sectors or peripheral protrusions that are delimited by concavities in the surface or margin and that are not proximally distinct from the remainder of the whole. The meanings of this term and its approximate synonyms sometimes have been supposed to differ according to the depth of the delimiting concavities relative to the midline or midpoint of the overall structure, and/or to the shape or proportions of the protrusions or sectors; however, there has been little consistency in the applications of the various terms according to such distinctions, which are ones only of degree and are necessarily arbitrary in any case. In general usage, these terms differ only indistinctly and connotatively: cleft, lobed (or lobate), parted (or partite) and segmented tend to connote fewer protrusions or sectors; lobate usually connotes as well a generally rounded shape; dissected tends to connote more numerous sectors that are elongate and angular. See also cut (incised, lacerate, torn), laciniate (slashed). |
torus 1 pl. tori |
= receptacle |
STRUCTURE |
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The relatively short, simple, axial structure surmounting a pedicel and basal to the flower, usually broader than the pedicel. |
chamber (not recommended) |
= cell (not recommended), locule |
FEATURE |
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Any structurally distinct compartment within an anther, ovary, fruit or other organ; not necessarily having any evolutionary integrity. |
nodal |
> interpetiolar |
position |
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Upon or associated with the nodes. |
mucous 2 |
= mucilaginous; < glutinous |
texture |
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Slimy. |
pubescent 1 (broad sense) |
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pubescence |
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Bearing trichomes. This is one of the most ambiguous terms in the botanical lexicon; it should not be used unless its intended meaning is explicit. |
blade |
= lamina |
STRUCTURE |
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The expanded, more or less planate, distal portion, when present, of a leaf, leaflet or bract. |
diffuse root |
> fibrous root |
STRUCTURE |
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Any member of a dense system of adventitious, slender roots that arise from the base of a main stem and functionally replace an evanescent primary root. |
lip |
= labium; > labellum |
STRUCTURE |
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Any substructure that resembles a lip, especially a portion of a perianth, calyx or corolla. |
craspedodromous, simple- |
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venation |
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Having a midvein that branches to either side along the length of the lamina, the secondary veins and their branches all running toward and terminating at the margin. |
piliferous |
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apex |
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Having a distinct, fine, weak, hair-like portion or protrusion. |
fan-shaped |
= flabellate, flabelliform |
solid shape |
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Strongly compressed, broadest near the apex and attenuate to a narrow base, plaited longitudinally, the alternating folds radiating from the base, the whole basically triangular in broad aspect; like a partially expanded folding fan. |