trigonous


Also found in: Dictionary, Encyclopedia.

trigonous

having three prominent angles, e.g. a plant stem or ovary.
References in periodicals archive ?
1-3 l (a), 2-3 Kyllinga 1-3 2 Kyllingiella 1-3 3 Lipocarpha 1-3 2-3 Oxycaryum 3 2 Pycreus 1-3 2 Queenslandiella 2 2 Remirea 3 3 Sphaerocyperus 3 3 Volkiella 2 3 Ficinia Clade Dracoscirpoides 3 3 Erioscirpus 2 3 Ficinia 3 3, 2-1 (a) Hellmuthia 3 3 Isolepis 1-3 2-3 Scirpoides 2-3 3 Ovary shape and Style base Taxon orientation persistence Cyperus Clade Alinula Trigonous Persistent Androtrichum Trigonous Persistent Ascolepis Trigonous/Dimerous- Deciduous dorsiventrally compressed Courtoisina Trigonous Persistent Cyperus s.
Hypogynium obscurely trigonous, with a whitish papillose crust, lacking tubercles 4.
Plants perennial, densely cespitose; fertile culms 50-110 cm tall, sharply trigonous, smooth, with glabrous, brown basal sheaths.
Species of subgenus Carex display the greatest variation in achene shape of all the major Carex groups, ranging from biconvex to trigonous, and from ovate to obovate, rhomboid or orbicular, with one to two lateral flexa (abrupt changes in curvature).
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 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 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.
8 mm wide; culms obtusely trigonous to compressed-trigonous; 0-1 sterile scales at the base of the spikelet (excluding the prophyll); anthers 1.
Fertile culms 4-30(-45) cm tall, erect or slightly curved, more or less trigonous (especially distally), smooth but sometimes scaberulent beneath the inflorescence, with glabrous, brownish basal sheaths.
Cypselae trigonous, truncate, glabrescent; pappus of rigid, scabrid bristles, plumose to scabrid at the apex.