trigonous


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trigonous

(ˈtrɪɡənəs)
adj
(Botany) (of stems, seeds, and similar parts) having a triangular cross section
References in periodicals archive ?
Hazony's trigonous delineation is compelling for three reasons.
The gynoecium in Cypereae vary from trigonous with three stigma branches (Fig.
Fruits obovoid, trigonous in cross section, 0.6-1 mm wide, glabrous, with a central depression.
It is a simple septicidal trigonous capsule with a weight of 179 [+ or -] 26.6 mg and invariably produces three seeds against the actual six ovules in a flower.
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.
Achenes 11.2 mm long, including the stylopodium and base, 0.6-0.65 mm wide, obovoid, trigonous with blunt or slightly costulate angles and convex faces, rounded at the apex and truncate below the stylopodium, stramineous to pale yellowish (very pale when immature), with 11-14 rows of horizontally elongated cells on the adaxial face and 9-11 rows on each of the abaxial faces, the cells whitish and visible through a translucid, glossy surface which appears almost smooth or with obscure longitudinal ribs (the glossy surface absent on immature achenes); stylopodium 0.1-0.16 mm long, 0.27-0.3 mm wide at the base, sessile or on an inconspicuous rib at the apex of the achene, depressed, with the central part minutely conic or pyramidal, acute, dark-brown.
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.
(0) concave-convex, (1) flattened, (2) trigonous. 8 steps.
However the fruits were said to be trigonous, which excludes C.
Capsule ellipsoid, trigonous, 11.5 mm long, 6.7 mm wide.
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.