Trigonochloa
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Snow2012PhytoKeys13, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Snow2012PhytoKeys13">{{Citation See also the citation download page at the journal. |
Name
Trigonochloa P.M. Peterson & N. Snow. Ann. Bot. 109: 1327. 2012. – Wikispecies link – Pensoft Profile
Type species:
Trigonochloa uniflora (Chipp.) P.M. Peterson & N. Snow.
Description
Plants annual to short-lived perennial, sometimes rhizomatous or stoloniferou. Culms (15–)35–130 cm long, terete in cross section, solid, decumbent or clambering to erect; nodes glabrous. Leaf sheaths half as long to slightly longer than internodes, glabrous or ciliate apically along margins; ligules 1–3.5 mm long, membranous, irregularly lacerate with age; leaf blades 1–13(–17) cm long, 0.3−14(–19) mm wide, linear to broadly ovate, flat, typically thin and flaccid, apex acuminate to acute. Panicles17−55 cm long, 2.0–8 cm wide, exserted at maturity, open, narrowly oblong to narrowly elliptic, composed of several to numerous unilateral, secund spikes or spicate racemes scattered along a central axis; rachis semi-terete; branches (1.5−)2–7 cm long, ascending, straight or slightly drooping. Spikelets 1.9−2.8 mm long, 1 (rarely 2-flowered), laterally compressed, subsessile, overlapping; disarticulation above the glumes; glumes 1.8−3.1 mm long, subequal, as long or longer than the floret, subequal, linear to narrowly ovate, 1-nerved, apex acute to acuminate, muronate or emucronate; lemmas 1.2−2.6 mm long, ovate, 3-nerved, thinly membranous to hyaline, minutely hairy along the nerves, apex acute, entire, awnless; paleas 1.5–2.5 mm long, keels ciliolate. Stamens 3. Caryopses 1−1.2 mm long, narrowly elliptic, trigonous in cross section, narrowly but deeply sulcate on the hilar side; surface smooth to slightly rugose-striate, light brown, pericarp fused, tightly adherent to endosperm. 2n = 36 for Trigonochloa uniflora (Gould and Soderstrom 1974[1]).
Comments
An appropriate common generic name to differentiate Trigonochloa from other members of Leptochloa is “triangle-seed grass”.
Key to species of Trigonochloa
Taxon Treatment
- Snow, N; Peterson, P; 2012: Systematics of Trigonochloa (Poaceae, Chloridoideae, Chlorideae) PhytoKeys, 13: 25-38. doi
Other References
- ↑ Gould F, Soderstrom T (1974) Chromosome numbers of some Ceylon grasses. Canadian Journal of Botany 52: 1075-1090. doi: 10.1139/b74-136
