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erose 1 |
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margin |
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Having rough, very irregular depressions throughout. |
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perisperm |
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STRUCTURE / SUBSTANCE |
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A genetically diploid (2n chromosomes) nutritive tissue in a seed; containing stored carbohydrate and/or oil utilized by the embryo prior to and especially upon germination; derived from the nucellus. See also endosperm (albumen). |
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buckler-shaped |
= scutate, scutiform |
solid shape |
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Relatively thin with opposite broad oblong faces, planate to shallowly concave-convex, sometimes thickened about the periphery such that each face has a marginal rim; like an oblong shield. See also platter-shaped (scutellate, scutelliform), which is not clearly distinct in its application. |
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lacuna pl. lacunae |
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FEATURE |
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A hole or cavity; an empty space surrounded by tissue in two or three dimensions. |
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tertiary vein |
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STRUCTURE |
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A strand belonging to the third order of vasculature in a leaf or other basically laminar structure, except when that is the ultimate order (consisting of veinlets); branching from a primary or secondary vein. See also costa, lateral vein, primary vein, rib, secondary vein, veinlet. |
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…faced |
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solid shape |
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Having relatively large, flat or shallowly curved portions of the external surface that are bounded by more or less distinct angular discontinuities in that surface, of the number indicated by the prefix; as in three-faced. |
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sack-shaped |
= bag-shaped, pouch-shaped, saccate |
solid shape |
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Irregularly obovoid with an exterior aspect intermediate between inflated and flaccid; like a closed pouch or bag. |
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wedge-shaped 2 |
= cuneate, obtriangular |
plane shape |
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Inversely triangular; like the outline of the broad lateral face of a wedge, broadest at the apex. See also obdeltate. |
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discoid 1 |
= disciform |
solid shape |
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Relatively thin with two round, plane or convex, opposite broad faces and a rounded circumferential edge; like a disc. See also lenticular (biconvex, lens-shaped), meniscoid, placentiform (placenta-shaped), trochlear (pulley-wheel-shaped). |
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spotted |
= blotched, maculate |
coloration |
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Having one or more areas that differ in color from the rest of the surface. See also eyespotted. |
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poricidal |
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dehiscence |
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Forming one or more apertures in the exterior wall, usually apically or sub-apically, through which the contents pass to the outside. |
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cell 2 (not recommended) |
= chamber (not recommended), locule |
FEATURE |
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Any structurally distinct compartment within an anther, ovary, fruit, sporangium or other organ; not necessarily having any evolutionary integrity. |
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areola 1 pl. areolae |
= areole |
STRUCTURE |
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Any distinctive surficial discontinuity of generally circular outline, whether concave, flush, or convex; when protuberant, sometimes bearing trichomes or spines, as in some Cactaceae. This term is used only when such entities are deemed structurally distinctive enough to merit description in their own rights, rather than as aspects of the surface. |
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commissure |
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FEATURE |
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Precisely, the joint or common boundary between the facing surfaces of two coherent or mutually appressed structures such as mericarps or stigmas, but traditionally (though imprecisely) applied to such a facing surface itself. |
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…lobed |
? …cleft, …fid, …lobate, …parted, …partite, …segmented |
plane shape |
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Having the number of lobes indicated by the prefix; as in five-lobed. |
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tuft |
> coma |
STRUCTURE |
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A distinct, compact, relatively dense, homogeneous aggregation of plants or constituent structures such as stems, branches, leaves, bracts or trichomes. |
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aciculate |
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coloration |
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Having fine, irregularly oriented, straight streaks of contrasting hue and/or intensity. |
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epibracteal |
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insertion |
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Upon the bracts, or partially adnate thereto and apparently arising therefrom. |
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boat-shaped |
= cymbiform, navicular |
solid shape |
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Like the generalized form of a boat hull, the walls relatively thin to moderately thick, the interior essentially empty and open along one side. |
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hyphodromous |
= one-veined, single-veined |
venation |
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Having one median, primary vein and no other venation externally evident. |
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style |
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STRUCTURE |
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A narrow, usually elongate, ontogenetically distal portion of a simple or compound pistil, overtopping the ovary and bearing one or more stigmas; arising from the summit of the ovary, but sometimes apparently from its base at maturity to ontogenetic displacement from its primordial distal position. In a compound pistil the various simple (carpellary) components of the style(s) may not be connate over their entire lengths; the pistil is then regarded as having a branched style or styles. |
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radiant 2 |
= radial, radiate, stellate |
arrangement |
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Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |
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bell-shaped |
= campanulate |
solid shape |
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Circular in cross-section, inflated proximally, thence broadening gradually to a flared distal portion. |
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vesicle |
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STRUCTURE |
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A small bladder-like part consisting of an enclosing wall or covering and an empty or fluid-filled interior, sometimes turgid; esp. in citrus fruits (hesperidia). |
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gongyloid |
= gongylodate, knob-shaped, knot-shaped, nodiform |
solid shape |
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Approximately globose, the surface convoluted or not, like a knob or knot; usually applied only to structures or components that are relatively small. |
