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capillus pl. capilli |
= hair; > glochid, glochidium; < cilium, trichome |
STRUCTURE |
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A hair-like trichome. |
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discolor(ous) |
> bicolor(ous) |
coloration |
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Having surfaces of different colors; esp. leaves with differently colored adaxial and abaxial surfaces. |
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crassate |
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architecture |
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Relatively thick for the type of structure or in the taxonomic context. |
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megaspore |
= macrospore (not recommended) |
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. |
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gemma pl. gemmae |
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STRUCTURE |
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A vegetative propagule by which a gametophyte reproduces asexually; produced by a process analogous to budding, from a more or less cupulate specialized area (gemmae cup) on the surface of the plant body (thallus); in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. |
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intercostal |
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insertion |
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Between the costae. |
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suprabasal |
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position |
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Just above the base of the structure in point. |
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clavate |
= club-shaped |
solid shape |
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Elongate and basically round in transverse section, the diameter greatest at or near a blunt apex, thence attenuate toward the base, the degree of taper greatest between the middle and the upper quarter. |
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epicalyx pl. epicalyces |
= calyculus |
STRUCTURE |
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A whorl of bracts immediately subtending (beneath or outside) a calyx. |
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rhachilla |
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STRUCTURE |
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See rachilla. |
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dextrorse |
= rightward |
orientation |
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Directed to the right, relative to the direction of growth along an explicit or implicit axis of reference. See also sinistrorse (leftward). |
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nodiform |
= gongylodate, gongyloid, knob-shaped, knot-shaped |
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. |
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xylem |
= wood |
STRUCTURE |
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The water-conducting and usually main supporting tissue of a plant or portion thereof, characterized by the presence of tracheary elements (tracheids and sometimes vessel elements); the lignified tissue of a plant or component structure, composed almost entirely of secondary tissue, i.e., that derived by secondary or lateral growth from a cambium in structures a season or more old. See also sapwood, heartwood. |
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heartwood |
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STRUCTURE |
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The senescent inner or central portion of the wood (xylem) of an older stem or root, its cells no longer living, in which conduction has ceased and primary reserve materials are no longer stored; often containing terminal metabolic products; usually darker in color than the living, conducting sapwood that encircles it. |
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pistil |
> carpel |
STRUCTURE |
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Any simple or compound, discrete or histologically distinct, female (ovule-producing) floral structure, or any putatively homologous sterile structure; comprising an ovary and one or more stigmas borne either directly upon the ovary or upon one or more intervening styles. See also gynoecium. |
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leaf 1 pl. leaves |
= frond, macrophyll (not recommended), megaphyll; > frond, needle |
STRUCTURE |
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A principal, vegetative shoot organ borne laterally from a stem node; its vascular tissues, if any, continuous with those of the stem; undergoing no significant secondary growth; usually more or less bilaterally symmetrical; comprising a distal, usually laminar blade and/or a proximal stalk (petiole) or sheath; usually a primary site of photosynthesis. |
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tongue-shaped |
= lingulate |
solid shape |
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Broadly elongate and compressed, one broad face more or less plane and the other convex, the edges rounded between them; like a tongue. |
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ala 1 pl. alae |
= wing |
STRUCTURE |
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Any elongate, relatively thin protrusion or appendage. |
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corm |
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STRUCTURE |
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A short, thickened, solid, usually subterranean, sometimes fleshy stem base containing stored carbohydrates and serving as a perennating organ. |
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…fid |
? …cleft, …lobate, …lobed, …parted, …partite, …segmented |
solid shape |
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Having the number of lobes, divisions or segments indicated by the prefix; as in bifid, quadrifid. |
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scalloplet |
= crenule |
FEATURE |
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A diminutive scallop (crena). See also sawtooth, sawtoothlet, tooth (dens), toothlet. |
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base |
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CHARACTER |
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Configuration of the lowermost or proximal portion of a structure, its extent determined somewhat subjectively in relation to the shape of the structure as a whole. The concept of base varies from one descriptive context to another, since the base is not a clearly delimited, morphologically distinct entity. The terms for describing basal condition are not strictly coordinate logically — some are more inclusive than others, and some describe conditions involving what can be regarded as appendages — and precise characterization may require using more than one descriptor. The semantic antecedent of some descriptors is "base," whereas the antecedent of others is the structure as a whole (e.g., leaf ). |
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paired |
= conjugate, geminate |
arrangement |
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Inserted by pairs, the members of each fused or not. |
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subtending |
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insertion |
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Arising from the axis just below and very near to the base of some other specified lateral structure. This term is meaningless if the structure that is subtended is not indicated. |
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elastoviscin |
= viscin |
SUBSTANCE |
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A sticky, elastic material, especially that forming the threads that sometimes connect pollen grains. |
