Monographs Details: Otostylis brachystalix (Rchb.f.) Schltr.
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. Upper Rupununi River, near Dadanawa, lat. 2°45'N., flowers white with "yellowish pink center," June 17, 1922, J. S. De La Cruz 1559; same locality and date, epiphytic, flowers white and yellow, De La Cruz 1565; Pakaraima Mts., Mt. Ayanganna, at base of mountain, 1000 m alt., occasional terrestrial, flowers white, February 5-6, 1955, B. Maguire, W. M. C. Bagshawe & C. K. Maguire 40569. VENEZUELA. Bolivar: Auydn-tepui, high plateau, 1000 m alt., on sandstone. May 5, 1937, F. Cardoyia 42; same locality, 1100 m alt., February 1938, G. H. H. Tate 1217a, 1218; Ilu-tepui, Gran Sabana, 1000 m alt., near Uarupata, locally frequent in marshy savanna, flower white with lip purple at base, February 10, 1952, B. Maguire 33283; same locality, 1200 m alt., northwest of San Rafael, occasional in drainage of Rio Kamarang, flowers white with lip yellowish at base, March 26, 1952, Maguire 33627; Chimana Massif, on western side of Apacara-tepui, by rapids of Rio Apacara over igneous rock, 1/4 mile downstream from mouth of Rio Abdcapa, 415 m alt., terrestrial (colonies often sterile), leaves erect, grass-green above and dull green beneath, flowers white with "top of lip on crest in center orange-yellow," column magenta at base, March 29, 1953, J. A. Steyermark 74693; region of Uriman, in Caiio Auacapd (tributary of the Apacara), 400-450 m alt., terrestrial in rain forest, August 22, 1954, Bernardi 1531; Auydn-tepuf, 1100 m alt., near Guayaraca, common in swamp, flowers white, April 1956, Vareschi & Foldats 4585; 115 km from El Dorado near Sta. Elena, abundant terrestrial in low damp, somewhat open woods, flowers white, "3.1.1957," E. Foldats 2852; Rfo Uaiparii, near Mariwa Falls, in swampy peaty soil in fairly tall woods, G. C. K. Dunsterville 441; Ptari-tepui, 1675 m alt., terrestrial on south-facing slopes, Steyermark 60970; along Rio Chicanan, between Puerto Lema and base of Sierra de Lema, lat. 6°5'N., long. 62-W., 300 m alt., terrestrial on sandy ground, leaves coriaceous, dull green "above and paler beneath, plaited, rachis magenta-purple, August 30, 1961, Steyermark 89653; a lo largo del camino al Sur de El Dorado, vecindades del Km 125, 1155 m alt., terrestrial, December 21, 1963-January 13, 1964, Steyermark & Dunsterville 92919; bosque hümedo en las vecindades del Km 119 al Sur de El Dorado, 1030 m alt., vicinity of granitic laja with Brocchinia micrantha, common terrestrial, leaves erect, flower white, lip yellow, maroon and white, January 12, 1961, Steyermark & Dunsterville 93018. Amazonas: Alto Rio Orinoco, northwest base of Cerro Yapacana, 150 m alt., "occasional around tree 'island' in Savanna No. 3," flowers white with lip yellow at the base, column with fine purple lines within at base, March 17, 1953, B. Maguire & J. J. Wurdack 34563; Rio Casiquiare 2 km above Solano, 100 m alt., on crystalline laja near left bank of Cano Duquiapo, frequent terrestrial in grass, flowers white with the lip orange-yellow in the center at the base, July 10, 1959, J. J. Wurdack & L. S. Adderley 43378. TRINIDAD (type of Zygopetalum brachystalix). This concept may be synonymous with O. lepida (Linden & Reichb. f.) Schlechter.

Discussion:

Zygopetalum brachystalix Reichb. f., Walp. Ann. Bot. Syst. 6: 660. 1863.

Distribution:Guyana South America| Venezuela South America| Trinidad and Tobago South America|