trigonous


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trigonous

(ˈtrɪɡənəs)
adj
(Botany) (of stems, seeds, and similar parts) having a triangular cross section
References in periodicals archive ?
Stems trigonous to triquetrous, glabrous, pubescent or scabridulous.
1 mm long, antheroids white, diminute, inconspicuous; capsule brown to dark brown ovoid to narrowly ovoid, slightly trigonous, 5-7 mm long, 2-3 mm in diameter, glabrous, reflexed; seeds brown to reddish-brown, fusiform, ca.
Flowers in Cyperoideae usually have a trimerous superior pistil consisting of a trigonous, unilocular ovary, a long single style and three stigmatic branches.
Deciduous trees; pneumatophores normally present; leaves two-ranked on short shoots, alternate, linear to linear-lanceolate, flattened, 3-17 mm long; pollen cones globose in pendent axillary racemes or panicles; ovulate cones 20-50 mm in diameter, subglobose, 5-10 scales, valvate, thin and woody; seeds trigonous, wingless.
Stamens included; filaments complanate, lilac toward the apex, the antepetalous ones adnate to the petals for 6-8 mm, the antesepalous ones free; anther base obtuse-sagittate, apex apiculate, apiculus nigrescent, dorsifixed above the base at 1/3 of its length; pollen globose, diporate, exine psillate; stigma conduplicate-spiral, ellipsoid-capitate, lilac-purple, margins crenulate-lacerate; ovary obconic, trigonous, 8-9 mm long, 6-7 mm in diameter at the apex, white, glabrous, bearing inconspicuous longitudinal sulcus; placentation apical; ovules shortly caudate; epigynous tube inconspicuous, ca.
Cypselae trigonous, truncate, glabrescent; pappus of rigid, scabrid bristles, plumose to scabrid at the apex.
5 in diameter, lobes entire or nearly so; ovary subclavate, trigonous, 17-18 mm long, 6-7 mm in diameter, greenish-white, glabrous; epigynous tube ca.
5 mm in diameter at apex, trigonous, greenish-white, glabrous; epigynous tube crateriform, ca.
7 mm long, sublinear, base acute and apex acute and apiculate, dorsifixed at the middle, the antesepalous ones slightly exceeding the antepetalous ones; pollen biporate, broadly oblong-elliptic, pores large, exine reticulate, lumina polygonal, muri narrowed; stigma conduplicate-spiral, ellipsoid, white, lobes with densely crenulate-papillose margins; ovary clavate, trigonous, white, glabrous, ca.
5 mm long, whitish, margins long fimbriate-papilose, papillae conspicuous; ovary subclavate, subterete to nearly trigonous, free and not fused to other ovaries, whitish, ca.