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nectariferous |
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exudation |
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Producing and secreting nectar; when glands are nectariferous, they are usually indicated nominatively as nectaries. |
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suprabasal |
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insertion |
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Just above the base of the structure in point. |
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elaiosome |
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STRUCTURE |
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A fleshy outgrowth from the seed coat (testa) that contains a high proportion of oil, usually attracting ants for dispersal. |
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spike |
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nominative |
inflorescence |
An elongate, determinate or usually indeterminate axis bearing sessile flowers inserted singly along it, unbranched or sometimes bearing lateral branches of the same nature. |
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microspore |
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STRUCTURE |
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A male spore; a spore of the smaller of the two types produced by the sporophytes of a heterosporous taxon; produced in a microsporangium; giving rise upon germination to a microgametophyte. |
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nutrition |
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CHARACTER |
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Mode of acquiring nutrients. |
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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). |
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inconspicuous |
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manifestation |
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Not prominently evident. |
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annulus 2 pl. annuli |
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STRUCTURE |
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A row of protruding specialized sporangial wall cells that extends upward from the base of the sporangium and over its apex, thus forming an incomplete circumferential ring; esp. in Polypodiophyta. The inner and radial walls of the annular cells are markedly thickened and the structure functions as a spore-releasing and -disseminating mechanism as a result of differential stresses developed within the mature sporangial wall upon desiccation. |
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mucro pl. mucrones, mucros |
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STRUCTURE |
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A short, hard, apical point that is a continuation of vascular tissue. See also apiculum. |
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strigose |
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pubescence |
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Bearing sharp, rigid, appressed, capillate trichomes. See also strigillose (strigulose). |
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interrupted 1 |
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architecture |
foliaceous structure |
Compound with the leaflets alternately large and small. |
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latex pl. latices, latexes |
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SUBSTANCE |
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A moderately viscous and sticky exudate, often milky, sometimes otherwise colored or clear. Overlaps conceptually with gum. |
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oblique 2 |
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orientation |
planate lateral structure |
Lying in a plane not coincident with the one defined by its longitudinal axis and that of the bearing structure. |
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heterocolpate |
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architecture |
pollen grain |
Having long, narrow, regularly disposed lacunae (pseudocolpi). |
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concolor(ous) |
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coloration |
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Uniform in hue and intensity of color; esp. leaves with identically colored adaxial and abaxial surfaces. |
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cap cell |
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STRUCTURE |
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The single cell, or one of the several cells, forming the uppermost (distal) portion of an antheridial wall. |
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equatorial ridge |
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FEATURE |
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A circumferential ring about a megaspore in the plane of its equator, raised above the remainder of the wall surface; in some heterosporous taxa of Polypodiophyta. |
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peloric |
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architecture |
corolla |
Regular when the usual condition in the taxon is irregular. |
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cirrhous |
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apex |
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Having a narrow spiral tip that is a continuation of the central primary vein. |
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asymmetric(al) 1 |
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plane shape |
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Not divisible into essentially equal halves along any line or plane. |
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levering |
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habit |
trichome |
Forming part of a pappus and reflexing at maturity, thus helping to loosen the individual fruit (cypsela) from the capitulum (head); in Asteraceae (Compositae). |
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dichasiate |
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architecture |
inflorescence |
Comprising one or more simple or compound dichasia. See also cincinnate, cymose, cymulose, helicoid-cymose, monochasiate, scorpioid-cymose. |
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exfoliating |
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relief |
bark |
Shallowly and distantly fissured, falling away in thin, relatively large patches or sheets. |
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resin |
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SUBSTANCE |
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A substance of high molecular weight consisting of organic acids, esters, and/or terpenes, produced within plant tissue and exuded from wounds as a liquid that hardens to an amorphous glassy state upon exposure. |
