primocane |
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STRUCTURE |
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A biennial or perennial stem before it has begun flowering, when the latter does not occur until at least its second season of growth; esp. in Rubus (Rosaceae). |
ramentaceous |
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pubescence |
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Of small, fragile, scarious, planate trichomes. |
rhytidomal |
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position |
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Within, upon, or otherwise directly associated with the bark. |
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. |
scar |
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FEATURE |
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A discontinuity in surface color and/or relief due to abscission of a structure formerly borne there. |
replicate |
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vernation |
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Each with the distal portion of its blade recurved, paralleling and contiguous with the proximal portion. |
intercostal |
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insertion |
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Between the costae. |
lacuna pl. lacunae |
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FEATURE |
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A hole or cavity; an empty space surrounded by tissue in two or three dimensions. |
jacket cell |
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STRUCTURE |
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Any of the cells forming the portion of an antheridial wall between the basal cells and the cap cell(s). |
basifixed |
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fixation |
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Attached at its base. |
soboliferous |
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architecture |
plant |
Having several, loosely clumped, principal stems that arise from a common underground stem system, each distinct above ground level. |
axillary |
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position |
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Within the axil; nodal and at or very close to the vertex of the distal angle between a lateral structure, especially a leaf, and the axis that bears it. |
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. |
spur 1 |
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STRUCTURE |
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A hollow protrusion from a calyx or corolla, often nectariferous. |
spinose 1 |
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apex |
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Terminating in a rigid, tapering, sharp continuation of the central primary vein. See also spinulose. |
adenopetalous 2 |
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derivation |
flower, perianth, corolla |
Having petals derived from glandular structures. |
stipule |
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STRUCTURE |
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Any distinct, relatively diminutive, more or less foliaceous structure inserted on a stem alongside a petiole, or on a petiole near its base, and ontogenetically closely associated with the leaf; usually occurring as one of a pair disposed one to either side of the petiole. |
calyculus 2 pl. calyculi |
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STRUCTURE |
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Collectively the bractlets (bracteoles) sometimes subtending (beneath or outside) the involucre in a capitulum (head); in Asteraceae (Compositae). |
mixed-craspedodromous |
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venation |
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Having a midvein that branches to either side along the length of the lamina, the secondary veins running thence toward the margin, some becoming indistinct before reaching it, others terminating there. |
cypsela pl. cypselae |
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nominative |
fruit |
Like an achene but derived from an inferior, bicarpellate ovary and with accessory perianth tissue adnate to the pericarp; esp. in Asteraceae (Compositae). |
…angular 1 |
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arrangement |
bundle scars |
Forming a figure with the number of sides indicated by the prefix. |
stylopodium pl. stylopodia |
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STRUCTURE |
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A discoid enlargement at the base of the styles; esp. in Apiaceae (Umbelliferae). |
diplostemonous |
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architecture |
flower, androecium |
Having the stamens dicyclic, the proximal whorl with members directly above the sepals, the distal whorl with members directly above the petals. See also obdiplostemonous. |
ovary |
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STRUCTURE |
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The proximal portion of a pistil (either simple or compound) within which the ovules are borne; usually of somewhat greater diameter and/or volume than the remainder of the pistil. |
diplotegium pl. diplotegia |
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nominative |
fruit |
A pyxis with accessory tissue adnate to the pericarp; derived from an inferior ovary. |