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oblique 1 |
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apex |
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Asymmetric about its longitudinal axis. |
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cladodromous |
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venation |
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Having a single median primary vein that branches to either side along its length, the secondary veins running thence toward the margin, but freely ramifying and becoming indistinct before reaching it. |
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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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present |
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presence |
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Occurring within the context in point. |
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disciform 1 |
= discoid |
solid shape |
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Relatively thin with two round, plane or convex, opposite broad faces and a rounded circumferential edge; like a disc. See also lenticular (biconvex, lens-shaped), meniscoid, placentiform (placenta-shaped), trochlear (pulley-wheel-shaped). |
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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. |
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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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secondary vein |
< lateral vein |
STRUCTURE |
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A strand belonging to the second order of vasculature in a leaf or other basically laminar structure, except when that is the ultimate order (consisting of veinlets); branching directly from a primary vein or, with undiminished diameter, from another strand of the second order. See also costa, primary vein, rib, tertiary vein, veinlet. |
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fossulate |
= colpate, furrowed, grooved, sulcate, valleculate |
architecture |
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Having one or more elongate, relatively narrow and shallow depressions (fossulae). |
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haustorium pl. haustoria |
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STRUCTURE |
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An absorbing and anchoring organ, often root-like, excrescent from a vegetative part of a parasitic or hemiparasitic plant, by which the plant communicates intimately with and derives sustenance and support from its host plant, into whose tissues the haustorium intrudes. |
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thread-like |
= filiform |
solid shape |
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Elongate and very slender, basically round in transverse section and of more or less uniform diameter, variously curved over its length or not. See also hair-like (capillary, capillate). |
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acropetal |
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development |
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Proceeding toward the apex, thus more advanced basally or proximally than apically or distally within a given frame of reference. |
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areola 1 pl. areolae |
= areole |
STRUCTURE |
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Any distinctive surficial discontinuity of generally circular outline, whether concave, flush, or convex; when protuberant, sometimes bearing trichomes or spines, as in some Cactaceae. This term is used only when such entities are deemed structurally distinctive enough to merit description in their own rights, rather than as aspects of the surface. |
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lyrate |
= lyre-shaped |
plane shape |
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Basically obovate but with several proximal concavities on each side, these sinuses opposite one another in pairs and decreasing in size toward the base; like the frontal outline of a lyre. |
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bracteate |
= bracted |
architecture |
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Bearing or subtended by one or more bracts. |
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nodal |
> interpetiolar |
insertion |
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Upon or associated with the nodes. |
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chaff 1 |
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STRUCTURE |
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Collectively, the paleae (pales, palets) sometimes borne on the receptacle of a capitulum (head) in Asteraceae (Compositae). |
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pappus pl. pappi |
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STRUCTURE |
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A set of one or more awns (aristae, bristles, setae) or scales at the summit of an inferior ovary just beneath or outside the free portion of the corolla; persisting in the fruit (cypsela) and often aiding wind or animal dispersal; in Asteraceae (Compositae). Considered by some to be an evolutionarily modified upper calyx portion, the lower portion having been incorporated into the floral tube casing adnate to the ovary wall; considered by others to be an outgrowth from the ovary wall. |
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pluri… |
= many-…, multi…, poly… |
prefix |
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Indicating presence of or constitution by a relatively large number of entities of the type denoted by the term's stem; as in plurilocular, pluriseriate. See also oligo… (few-…). |
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rank |
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FEATURE |
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A sequence of lateral structures arising from the same axis at successive points along its length and diverging from it in the same direction. |
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epichilium |
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STRUCTURE |
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The distal portion of a labellum (lip) that has distinct proximal, distal, and sometimes also central parts; in Orchidaceae. See also hypochilium, mesochilium. |
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scale 1 |
< bract |
STRUCTURE |
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A basically dry, more or less appressed, diminutive bract. The choice of term as between the more general bract and the more restricted scale is sometimes problematic and, when so, often is dictated by custom according to the structure and taxon involved. |
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smooth 1 |
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relief |
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Even or unrelieved overall. Strictly applied, this term refers only to the surface proper; however, it is often used to mean glabrous as well. |
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gynandrium pl. gynandria |
= column, gynostemium |
STRUCTURE |
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A central floral structure consisting of the partly to wholly fused (connate and adnate) androecium and gynoecium; esp. in Orchidaceae. |
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stomatal pore 1 |
= stoma (strict sense) |
FEATURE |
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The opening between and regulated by the two guard cells of a stomate (stomatal apparatus). |
