Monographs Details: Oncidium orthostates Ridl.
Authority: Schweinfurth, Charles. 1967. Orchidaceae of the Guayana Highland. Mem. New York Bot. Gard. 14: 69-214.
Description:Distribution and Ecology - VENEZUELA. Bolivar: Roraima region, Ireng River, Im Thurn 12 (type); upper slope, in savanna, W. H. Campbell 23; Ule s.n.; Kwaimatta Savanna, McConnell & Quelch 281; Auyan-tepui, 1100 m alt., December 1937-January 1938, G. H. H. Tate 1219, 1221; same locality, Alto Caroni, 1100 m alt., in savanna, flowers yellow, January 1949, F. Cardona 2731; same locality and altitude, terrestrial or lithophytic, very abundant in more or less dry savannas near Guayaraca, April 1956, Vareschi & Foldats 4642; Rio Caroni, 800 m alt., in open rocky situations of the Mureyema streams, October 10, 1946, Cardona 1811; Ilu-tepui, Gran Sabana, 1200 m alt., between San Rafael and Enemasic, occasional in savanna, 5 outer perianth-members bronze-tinged, lip faintly spotted beneath, February 5, 1952, B. Maguire 33166. Frontier between Territory of Rio Branco (Brazil) and State of Bolivar (Venezuela), 720 m alt., 5 k m southeast of Serra Sabang, terrestrial, infrequent on rocks in savanna, flowers yellow marked with bronze, December 16-18, 1954, B. & C. K. Maguire 40275. Amazonas: Mt. Duida, sepals and petals yellowish green with central dull red blotch, lip bright yellow, white on back, callus yellow with red dots, column-wings yellow, March 1932, Mrs. Hitchcock s.n.; Serrania Yutaje, Rio Manapiare, Cerro Coro-Coro, 1500 m alt., infrequent terrestrial on rocks, flowers yellow tinged with bronze, March 2, 1953, B. & C. K. Maguire 35468.
Distribution:Venezuela South America