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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. |
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texture |
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CHARACTER |
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Substantial properties. Overlaps conceptually with solid shape, as to thickness. |
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fertile |
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reproduction |
plant, reproductive structure |
Producing functional spores, gametes, pollen, ovules, seeds, or other propagules. |
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herb |
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nominative |
plant |
Annual, biennial, or perennial with no woody (lignified) tissue in any part of the shoot; when persisting over more than one growing season, the parts of the shoot dying back seasonally. |
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obturbinate |
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solid shape |
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Inversely turbinate (top-shaped). See also pyriform (pear-shaped). |
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basicauliramous |
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architecture |
plant |
Having the stem(s) branching at or near the base. See also basiramous. |
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homosporous |
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reproduction |
taxon |
Producing only one type of spore, each spore giving rise to a gametophyte that bears gametangia of both sexual types. |
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scorpioid-cymose |
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architecture |
inflorescence |
Comprising one or more scorpioid cymes. See also cincinnate, helicoid-cymose. |
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trulloid |
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solid shape |
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Elongate, basically square in transverse section, broadest below the middle, regularly attenuate to angular ends, all faces essentially plane. See also obtrulloid. |
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accessory cell |
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STRUCTURE |
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One of the cytologically distinctive epidermal cells that are sometimes present in a stomate and that surround and are regularly oriented in relation to the guard cells. |
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prophyllar |
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position |
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Upon or otherwise directly associated with the prophylls (bracteoles, bractlets). |
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cloying |
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odor |
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Sickeningly sweet. |
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birettaform |
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solid shape |
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Approximately square in cross section and shallowly convex at the top; like a biretta (Roman Catholic cleric's hat). |
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hysterophyllous |
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maturation |
non-foliar structure, esp. flower |
Maturing later than the leaves. |
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palmatifid |
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plane shape |
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Palmately lobate; having three or more lobes whose longitudinal axes radiate from a common point. |
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semielliptic |
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arrangement |
bundle scars |
Forming an incomplete ellipsis, like the letter U. |
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adenopetalous 1 |
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architecture |
flower, perianth, corolla |
Having petals produced from glandular structures. |
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mamilla pl. mamillae |
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STRUCTURE |
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A nipple- or teat-shaped protrusion. |
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pulvinus pl. pulvini |
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STRUCTURE |
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A short, cushion-like swelling at the junction of stem and leaf or of inflorescence axis and branch. |
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comose |
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pubescence |
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Bearing a prominent single tuft of relatively long and slender, flexible, capillate trichomes (coma). |
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infrabracteal |
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position |
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Upon the axis directly below a bract insertion. |
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partial |
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extent |
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Not reaching fully from the ovary wall or pericarp to the center of the ovary or fruit and/or from the apex to the base of its interior, thus not completely separating adjacent locules, which are recognized and delimited by extrapolating from the incomplete septal boundary(ies), the ovary or fruit nonetheless effectively unilocular. |
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unisexual |
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reproduction |
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Having functional reproductive structures of only one sex. See also imperfect, pistillate, staminate. |
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membrane |
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STRUCTURE |
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A relatively thin layer of tissue that covers or separates other, different tissue(s) and/or empty space(s). |
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radical |
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insertion |
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Upon, arising from, or otherwise directly associated with the root. |
