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. |
banded |
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coloration |
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Broadly striped; having one or more elongate, relatively broad and, when multiple, more or less parallel, areas of contrasting hue and/or intensity. |
velamen pl. velamina |
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STRUCTURE |
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A thin, often chartaceous (papery, papyraceous) or pergamentaceous (parchment-like), outermost tissue layer of an aerial root; esp. in Orchidaceae. |
lineolate 1 |
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coloration |
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Finely lineate, the lines short and often irregularly oriented. |
unisexual |
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reproduction |
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Having functional reproductive structures of only one sex. See also imperfect, pistillate, staminate. |
fixation |
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CHARACTER |
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Mode of attachment to a supporting structure. |
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. |
viscidium pl. viscidia |
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STRUCTURE |
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A small, viscid, glandular body of rostellar origin that becomes connected with a pollinium caudicle, either directly or through an intervening stipe, by which the pollinium attaches to a pollinating insect; in Orchidaceae. |
free |
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fusion |
dissimilar structure(s) |
Not fused with or joined to any other dissimilar structure(s). |
obturbinate |
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solid shape |
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Inversely turbinate (top-shaped). See also pyriform (pear-shaped). |
dichasium pl. dichasia |
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nominative |
inflorescence |
Determinate and falsely dichotomous with each axial segment bearing a sessile terminal flower and either a pair of opposite pedicellate lateral flowers or a pair of opposite lateral branches. See also cincinnus, cyme, cymule, helicoid cyme, monochasium, scorpioid cyme. |
cyathiate |
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architecture |
inflorescence |
Comprising one or more cyathia. |
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. |
seedling |
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PLANT |
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A plant in the first stages of its growth following emergence from the seed. |
pepo |
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nominative |
fruit |
Like a berry but derived from a single, inferior, compound ovary, with accessory floral-tube tissue adnate to the pericarp, having a relatively thin, hard or leathery rind and a thicker, fleshy inner wall that surrounds a mass of seeds; esp. in Cucurbitaceae. |
microsporangium pl. microsporangia |
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STRUCTURE |
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A sporangium that produces microspores. |
horizontal |
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orientation |
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Parallel to the horizon, perpendicular to the force of gravity. |
aciculate |
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coloration |
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Having fine, irregularly oriented, straight streaks of contrasting hue and/or intensity. |
clambering |
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habit |
plant, axis |
Reclining upon and spreading across other plants or objects without the aid of special holding structures or growth patterns. |
embryotega pl. embryotegae, embryotegas |
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STRUCTURE |
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A small, hardened, lid-like portion of the testa (seed coat) at the micropyle of some seeds, detaching at germination. |
infrafoliar |
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position |
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Upon the stem directly below a leaf insertion. |
solitary 1 |
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arrangement |
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Disposed singly, each remote from any others. |
concentric |
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position |
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Having a center or axis of symmetry coincident with that of the context of reference. |
simple-craspedodromous |
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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. |
collateral |
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insertion |
buds |
In pairs within or immediately straddling the leaf axils, the members of a pair lateral to one another. |