disc floret |
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STRUCTURE |
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A floret that has an actinomorphic corolla, is bisexual, functionally staminate, or functionally pistillate, and is borne in a radiate, discoid, disciform, or radiant capitulum (head) interior (distal) to any peripheral series of differing florets that may be present; in Asteraceae (Compositae). |
areolate |
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relief |
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Having numerous, small, irregularly disposed, transversely angular, shallow depressions or low protrusions overall. |
lateral |
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position |
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To, toward, at, or upon a side, not apical or basal. |
mucronulate |
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apex |
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Finely mucronate. See also apiculate. |
flexuose |
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course |
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See flexuous. |
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. |
suprabasal |
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insertion |
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Just above the base of the structure in point. |
ligule 4 |
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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). |
trichotomous |
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architecture |
axis |
Branching by division of the apical meristem producing three coordinate but not necessarily equal derivatives from each division. |
asymmetric(al) 1 |
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architecture |
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Not divisible into essentially equal halves along any line or plane. |
chaff 2 |
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STRUCTURE |
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Collectively, the glumes, lemmata, and paleae of mature spikelets; in Poaceae (Gramineae). |
hemispheric(al) |
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solid shape |
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Half-spheric(al); broadest at the base and uniformly rounded to the apex, circular in any transverse section, and half-circular in any median longitudinal section. |
prolate |
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plane shape |
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Symmetrically elongate parallel to the developmental or polar axis. |
spongy |
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texture |
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Soft, light, discontinuous but cohesive, and somewhat resilient. |
symmetric(al) 1 |
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solid shape |
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Divisible into essentially equal halves along one or more lines or planes. |
cotyliform |
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solid shape |
perianth, calyx, corolla |
Having a short, relatively broad, cupulate tube and a well differentiated, erect limb. See also cyathiform, urceolate (urn-shaped). |
barb 2 |
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STRUCTURE |
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A trichome terminated by one or two small, relatively short, stiff, sharp, acutely reflexed appendages. |
capsular |
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architecture |
fruit |
Having the structure and texture of a capsule. |
erect |
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orientation |
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Perpendicular to the horizon or to the general plane of a bearing structure. |
androecium pl. androecia |
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STRUCTURE |
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The stamen(s), staminode(s), if any, and their ontogenetically associated structure(s), if any, of a single flower, taken collectively. |
infrafoliar |
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insertion |
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Upon the stem directly below a leaf insertion. |
nucellus pl. nucelli |
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STRUCTURE |
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The distinct, genetically diploid tissue layer immediately surrounding the embryo sac of an ovule; often considered equivalent to a megasporangium wall. |
obtrulloid |
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solid shape |
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Inversely trulloid. |
secondary root |
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STRUCTURE |
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Any root branch that originates directly or indirectly from a primary root. |
corolla tube 2 |
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STRUCTURE |
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The portion of the corolla of a bisexual or staminate disc floret proximal to the level of filament insertion; in Asteraceae (Compositae). |