Monographs Details: Trigonidium acuminatum Bateman ex Lindl.
Authority: Schweinfurth, Charles. 1967. Orchidaceae of the Guayana Highland. Mem. New York Bot. Gard. 14: 69-214.
Family:Orchidaceae
Description:Distribution and Ecology - BRITISH GUIANA. Bartica-Potaro Road, I4th-15th mileposts, epiphytic on fallen trunk, August 20, 1937, N. Y. Sandwith 1151; basin of Kuyuwini River (tributary of the Essequibo), along the river, about 150 miles from the mouth, epiphyte in dense forest, perianth segments dull yellow with purple lines, November 21-26, 1937, A. C. Smith 2590. COLOMBIA. Vaupes: Cerro de Yapoboda, at the headwaters of Rio Kuduyari, about 184 m alt., in savanna among scrub, August 15, 1960, L. A. Garay 109. VENEZUELA. Bolivar: Canaima, 460 m alt., at edge of fairlv open forest, G. C. K. Dunsterville 162; Ptari-tepui, below Santa Teresita de Kavanayén. 915-1065 m alt., lower portion of Quebrada O-paru-má, tributary of Rio Pacairao, on tree, sepals and petals yellow or buff striped with lavender, November 25, 1944, J. A. Steyermark 60545; Cerro Guaiquinima, Rio Pardgua, Raudal Ouraima, 175 m alt., occasional epiphyte in dry riverine woodland, flowers yellowish striped with bronze, the sepals reflexed, January 16-19, 1952, B. Maguire 33149. Amazonas: Rio Orinoco, Rio Cuao, at Danta (Tapir) Falls, 125 m alt., frequent epiphyte, flowers yellow, November 19, 1948, B. Maguire & L. Politi 27336. SURINAM, BRAZIL and PERU (type of T. peruvianum). The types of T. acuminatum and T. tenue were from BRITISH GUIANA.

Discussion:

Trigonidium tenue Lodd. ex Lindl., Bot. Reg. 25: Misc. 44, no. 59. 1839.

Trigonidium peruvianum Schlechter, Fedde Repert. Beih. 9: 107. 1921; Mansf., Fedde Repert. Beih. 57: t. 127, nr. 497. 1929.

Distribution:Guyana South America| Suriname South America| Brazil South America| Venezuela South America| Colombia South America| Peru South America|