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bulb |
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STRUCTURE |
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A thickened underground perennating structure consisting of a stem with numerous closely proximate nodes bearing many tightly imbricate, thickened, often fleshy, foliaceous organs containing large amounts of stored food, usually in the form of starch; the whole usually enveloped and protected by imbricated scarious or fibrous foliaceous organs. |
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integumentary |
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derivation |
aril |
Produced from or a modification of one or both seed integuments. |
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valvate 1 |
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aestivation |
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Whorled and with members not overlapping, adjacent members laterally contiguous at their margins. |
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elater 1 |
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STRUCTURE |
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An elongate cell with a helical, hygroscopic thickening in its wall, contained within a sporangium, expanding and contracting with changes in humidity and aiding dispersal of the spores; esp. in Hepaticae. |
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androecial tube |
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STRUCTURE |
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The tubular portion of an androecium in which the component structures have fused with one another laterally over part or all their lengths. |
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microsporocarp |
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STRUCTURE |
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A sporocarp that bears only microsporangia. |
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superaxillary |
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position |
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Internodal but close to and directly above the axil(s). |
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corm |
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STRUCTURE |
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A short, thickened, solid, usually subterranean, sometimes fleshy stem base containing stored carbohydrates and serving as a perennating organ. |
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calyptriform |
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solid shape |
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Hollow, roughly circular in cross-section, broader and open distally, and tapering to a closed apex, like a candle snuffer or elongate hood. |
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isthmus |
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STRUCTURE |
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A narrower portion connecting two wider or broader portions of an inclusive structure. |
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smooth 2 |
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relief |
bark |
Unfissured; not cracked or split to any significant degree. |
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mucronate |
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apex |
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Terminating abruptly in a short, hard point that is a continuation of vascular tissue. See also apiculate, mucronulate. |
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resinous 2 |
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texture |
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Having the consistency of resin. |
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crassate |
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architecture |
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Relatively thick for the type of structure or in the taxonomic context. |
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laevigate 1 |
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relief |
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Very smooth. |
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eucamptodromous |
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venation |
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Having a single median primary vein that branches to either side along the length of the lamina, the secondary veins upwardly arcuate, gradually becoming indistinct interior to the margin, and serially interconnected by cross-branches without formation of marginal loops. |
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gynodioecious |
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reproduction |
taxon |
Having some plants with only bisexual flowers and some with only pistillate ones. |
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neuter |
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architecture |
flower, floret |
Lacking both stamens and pistils. |
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terete |
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solid shape |
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Elongate and transversely round, gradually attenuate from base to apex; attenuate-cylindric or attenuate-tubular, broadest at the base. See also obterete. |
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farina pl. farinae, farinas |
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SUBSTANCE |
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A dry, meal- or flour-like covering. |
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deciduous 1 |
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duration |
structure |
Separating and falling away from the bearing axis, organ or plant prior to senescence of the latter, usually by developing an anatomically distinct, transverse, basal zone of cells (abcission layer), where separation occurs. See also seasonally deciduous. |
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circumcaulous |
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position |
|
Upon and surrounding the stem. |
|
ligule 4 |
|
STRUCTURE |
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The distal, relatively flat portion of the zygomorphic corolla of a ligulate floret, terminating in 5 teeth or lobes; in Asteraceae (Compositae). |
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praemorse |
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apex |
|
Truncate with the distal margin irregular or ragged, as if chewed. |
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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. |
