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sulcus pl. sulci |
= colpus, fossula, furrow, groove, vallecula |
FEATURE |
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An elongate depression that is relatively shallow and narrow. |
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trapeziform |
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plane shape |
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Four-sided and either asymmetrical or bilaterally symmetrical like a triangle truncated distally perpendicular to its central axis. |
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…verticillate |
= …cyclic, …seriate, …whorled |
arrangement |
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Disposed in the number of verticils (cycles, series, whorls) indicated by the prefix; as in five-whorled, 3-whorled. |
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attenuate 1 |
= concave-tapered |
base |
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Gradually diminishing in width or diameter toward the proximal end, the sides longitudinally concave. Corresponds with acuminate for apex shape. |
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median |
= central, medial |
insertion |
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At, upon, or closely ranged about the structural or symmetrical midpoint or axis. |
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attenuate 2 |
= tapered |
plane shape |
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Gradually diminishing in width from one end to the other. |
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median |
= central, medial |
position |
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At, upon, or closely ranged about the structural or symmetrical midpoint or axis. |
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oblong 2 |
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solid shape |
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Compressed-ellipsoid, the sides approximately parallel from near one end to near the other. See also ellipsoid(al). |
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penta… |
= five-… |
prefix |
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Indicating presence of or constitution by five entities of the type denoted by the term's stem; as in pentandrous, pentacarpellate, pentacolporate. |
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crenate |
= scalloped |
margin |
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Having regularly alternating, rounded convexities and concavities oriented more or less perpendicular to the generalized perimeter. See also crenulate (small-scalloped), dentate, denticulate (small-toothed), serrate (sawtoothed), serrulate (small-sawtoothed). |
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primary root |
> taproot |
STRUCTURE |
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The one, central root directly basal to a shoot, developing directly from the embryonic radicle; the first-formed root of a plant, being the only one truly central in nature (i.e., belonging to the original central axis of the plant). All other roots of a plant develop subsequently and are lateral in nature. The primary root may be permanently dominant, developing into a taproot; otherwise it may be transitory or become functionally subordinate, with secondary and/or adventitious roots becoming dominant. |
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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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seed |
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STRUCTURE |
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A mature or ripened ovule containing an embryonic sporophyte and a nutritive tissue (endosperm or perisperm) with stored food that sustains the initial growth of the embryo upon germination, except when such food reserve is stored instead in the cotyledon(s) of the embryo itself, these enclosed by one or two integuments (the testa), the whole serving as a propagule. A fertile seed (one containing a viable embryo) normally results from sexual fertilization of an egg by a sperm; however, fertile seeds are sometimes produced asexually by apomictic processes (e.g., parthenogenesis). |
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foveate |
= pitted |
relief |
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Having numerous, small, rounded depressions. See also foveolate (fine-pitted, scrobiculate). |
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spinose 1 |
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apex |
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Terminating in a rigid, tapering, sharp continuation of the central primary vein. See also spinulose. |
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integument |
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STRUCTURE |
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A distinct layer of tissue that encloses and serves to protect the other tissues of an organ, especially a seed. |
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throat 2 |
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STRUCTURE |
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The fully connate portion of the limb of a disc floret, proximal to the lobes (distinct distal portions of the petals); in Asteraceae (Compositae). |
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ligule 3 |
|
STRUCTURE |
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A relatively small, attenuate, membranous, laminar enation from the adaxial surface of a leaf near its base; in Selaginella, Isoetes. |
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vallecular |
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position |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
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actinodromous |
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venation |
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Having three or more primary veins that diverge radially from a point at or above the base of the blade and run toward the margin, reaching it or not. |
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areole 1 |
= areola |
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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bracteole 1 |
= bractlet; < bract |
STRUCTURE |
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A diminutive bract, or a bract that is smaller than others present. |
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node |
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STRUCTURE |
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One of the evident sectors of a stem that occur sequentially along its length and from which leaves (megaphylls) and lateral branches arise exogenously. The anatomy of nodes differs from, but is not abruptly distinct longitudinally from, that of the intervening sectors (internodes), with which it is smoothly confluent and from which is distinguished by the lateral transit and egress of vascular traces interconnecting the stem and the leaves and branches that it bears. |
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corniculum pl. cornicula |
= horn |
STRUCTURE |
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A straight or curved, slenderly conic or conoidal protrusion or terminal portion that resembles an animal horn. |
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pollen |
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STRUCTURE |
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Collectively, the spores or grains produced within the thecae of anthers, each containing a very small microgametophyte (or its evolutionary homologue); serving as disseminules from which microgametes are released after transport to a receptive micropylar pollen droplet (in Pinophyta) or stigma (in Magnoliophyta) by a variety of vectors, notably wind, water, insects, bats, and birds. |
