caespitose |
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habit |
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See cespitose. |
pseudobulb |
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STRUCTURE |
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An enlarged internode of an aboveground stem, storing water and photosynthate, resembling a bulb; esp. in Orchidaceae. |
polyadal |
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arrangement |
pollen |
Shed in groups of more than four, each group comprising grains from two or more original tetrads, the latter intact or not. |
stigma pl. stigmata, stigmas |
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STRUCTURE |
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An exposed, localized portion of a pistil that retains deposited pollen and stimulates its germination, the pollen tubes then growing through or along it toward the ovule(s). |
centrifugal |
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development |
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Proceeding away from the center, thus more advanced centrally than peripherally within a given frame of reference. |
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). |
xylary |
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position |
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Within or otherwise directly associated with the wood. |
runcinate |
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plane shape |
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Basically obovate with a series of retrorse, acute lobes on either side, these diminishing in size toward the base. |
prolate |
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plane shape |
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Symmetrically elongate parallel to the developmental or polar axis. |
strigose |
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pubescence |
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Bearing sharp, rigid, appressed, capillate trichomes. See also strigillose (strigulose). |
circinate 2 |
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vernation |
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Having each leaf (frond) rolled adaxially from the sides and downward from the apex, forming a tight, flat coil; esp. in Polypodiophyta. |
tree |
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nominative |
plant |
Perennial, woody, more or less erect, relatively tall, with one or more distinct aboveground portions each with a single, relatively stout, columnar, main stem (trunk or bole) that bears branches. See also bush, frutex, shrub, subshrub, suffrutex, undershrub, woody clump. |
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. |
calyptra pl. calyptrae |
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STRUCTURE |
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A distal hood- or lid-like portion that detaches as a unit from the remainder of the structure; esp. in some Papaveraceae the unopened calyx that separates from the rest of the flower at anthesis. |
comose |
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pubescence |
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Bearing a prominent single tuft of relatively long and slender, flexible, capillate trichomes (coma). |
calyptrate |
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architecture |
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Having or constituting a calyptra. |
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. |
silique |
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nominative |
fruit |
Dry, septifragal, two-loculed and derived from a single, superior, compound ovary; much longer than broad; dehiscing along two sutures, one adaxial, one abaxial, leaving a single persistent septum (replum) after the two valves of the pericarp have fallen away; esp. in Brassicaceae (Cruciferae), Capparaceae. See also silicle. |
trichotomocolpate |
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architecture |
pollen grain |
Having a triradiate surficial groove (colpus). |
laminate |
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architecture |
foliaceous structure |
Having an expanded, more or less planate, distal portion (lamina or blade). |
supramedial |
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insertion |
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Just above the middle of the structure in point. |
antheridium pl. antheridia |
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STRUCTURE |
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A male gametangium; a multicellular fertile organ of a mature gametophyte within which male gametes (antherozoids, spermatozoids) are produced and from which they are discharged, in some taxa forcibly, through a pore. Technically present but highly reduced and of no descriptive significance in Magnoliophyta and part of Pinophyta. |
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. |
lineate 1 |
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coloration |
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Having very narrow, straight, clear or colored lines that contrast with the ground color. |
…angular 1 |
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arrangement |
bundle scars |
Forming a figure with the number of sides indicated by the prefix. |