trigonous


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trigonous

having three prominent angles, e.g. a plant stem or ovary.
References in periodicals archive ?
In this tribe, as it occurs in other Cyperoideae, this annular ovary primordium possibly results from a congenital fusion of three distinct carpel primordia (trigonous ovary) or two carpel primordia (dorsiventrally and laterally compressed ovary).
Hypogynium obscurely trigonous, with a whitish papillose crust, lacking tubercles 4.
Ovary pedicelate, trigonous, shortly 3-winged, thickened towards the apex, ca.
fernandezensis 3 (1).Perigynia less than 20 per spike, trigonous, opaque; pistillate scales whitish, awned 3.
Capsules exserted from the cyathium, 0.8-1.2 cm high, 1-1.7 cm diam., deeply 3-lobed, green, smooth to covered with an inconspicuous network of low ridges; seed trigonous to subglobose, 4.5-8 mm long, 4.5-6 mm diam., ecarunculate, brownish.
It is obviously a trigonous achene belonging to another species.
2.5 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.
1.5 mm long altogether, the stipe shorter than to nearly as long as the sharply trigonous body, the stylar end slender elongate, slightly broadening and scaberulous-papillose distally; achene surface pale, minutely cancellate-punctate, the 3 edges smooth, wirelike, glassy.
Column erect, arcuate, trigonous, 6(8) mm long and 2-2.5 mm wide at apex, truncate, base yellow with some reddish-purple, middle white to white-purple and towards the apex purple to greenish-purple; stigmatic surface green; column foot (1.5)2 mm long.
4.5 mm in diameter at apex, trigonous, greenish-white, glabrous; epigynous tube crateriform, ca.
Flowers in Cyperoideae usually have a trimerous superior pistil consisting of a trigonous, unilocular ovary, a long single style and three stigmatic branches.
Leaves filiform, 0.3-0.8 mm wide; culms obtusely trigonous to compressed-trigonous; 0-1 sterile scales at the base of the spikelet (excluding the prophyll); anthers 1.7-2.8 mm long; achene 1.1-1.5 mm wide C.