Monographs Details: Rhynchospora trichochaeta C.B.Clarke
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Cyperaceae
Description:Distribution and Ecology - Distribution. Rare in southern Venezuela and adjoining northern Amazonia of Brazil. VENEZUELA. Amazonas: Puerto Ayacucho, 100 m alt, Holt & Blake 822 (NY, US). BRAZIL. Amazonas: Rio Branco, Surumu, large open campo of Serra do Mel, Ule 8083 (US); Para: Alto Ariramba, campina rana, Ducke 8016 (MG).

Discussion:

Fig 15A-C.

Trichochaeta tenuis Steudel, Syn. Pl. Glumac. 2: 156. 1855. Type. Gardner 2385 (BM, K, NY) from Brazil.

Rhynchospora denticulata Huber, Bol. Mus. Paraens. 5: 37. 1909. Type. Ducke 8016 (MG) from Alto Ariramba, Para, Brazil.

Rhynchospora mexicana (Liebm.) Steudel var trichochaeta (C. B. Clarke) K√ľkenthal, Bot. Jahrb. 56(Beibl. 125): 16. 1921. Based on Rhynchospora trichochaeta C. B. Clarke.

Type. Gardner 2385 (BM, K, NY) from Brazil, without details.

The difference between this species and R. subplumosa is discussed under R. subplumosa. On account of its lacking a conspicuous rhizome, R. trichochaeta comes closest to R. mexicana of Central America and the West Indies, from which it differs in its smaller elliptic 3- to 3.2-mm-long achenes vs oblong 4- to 4.7-mm-long ones, its yellow-brown acute-tipped membranous glumes vs orange-brown subobtuse-tipped subcoriaceous ones, and its densely long-ciliate bracteoles vs glabrous ones. This rare species has so far been known from the Guayana region only by a single collection, Holt & Blake 822, cited above.

Distribution:Venezuela South America| Brazil South America|