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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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canescent |
= hoary |
pubescence |
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Densely covered with gray, fine, relatively short, capillate trichomes. |
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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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bi… 1 |
= di…, two-… |
prefix |
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Indicating presence of or constitution by two entities of the type denoted by the term's stem; as in bicarpellate, biciliate, bifid, bilocular. See also entries for particular terms beginning with this prefix whose meanings, at least in some applications, are more specific than usually indicated by such combination. |
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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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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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cladophyll |
= cladode, phylloclade |
STRUCTURE |
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A stem segment that functions as a leaf; often more or less compressed. |
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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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…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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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. |
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mamilla pl. mamillae |
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STRUCTURE |
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A nipple- or teat-shaped protrusion. |
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unctuous 1 |
= greasy, oily, oleaginous |
coating |
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Of a grease- or oil-like film. |
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funicle |
= funiculus; < stalk |
STRUCTURE |
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A stalk that attaches an ovule to a placenta of the ovary wall. |
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corrugate 2 |
= rugose, wrinkled |
relief |
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Having irregular, narrow ridges or creases, the intervening areas flat or only slightly concave or convex, appearing overall as though crumpled and then spread out. See also rugulose. |
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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). |
