Pleurothallis tricarinata Poepp. & Endl. 1836 SUBGENUS Acianthera SECTION Tricarinatae Luer 1986
Photo courtesy of © Dalton Holland Baptista
Photo by Gilberto Khouri and his Flickr orchid photo site
Photo courtesy of Eric Hunt
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Common Name The Three Keeled Pleurothallis
Found in Ecuador, Peru, Bolivia, and Brazil in wet montane forests at elevations of 80 to 1650 meters as a small sized, hot to cool growing epiphyte with erect ramicauls enveloped basally by 2 to 3 basal, loose, tubular, imbricating, acuminate sheaths all carrying a single, apical, elliptic-lanceolate, acute, dark green leaf with a compressed, petiolate base that blooms in the fall, winter and early spring on a congested, terminal, 10" [25 cm] long, racemose many flowered inflorescence subtended by a spathe.
CAUTION!!Most sources include P platystachys as a synonym of theis species but I have separated them pending more information.
Synonyms Acianthera tricarinata (Poepp. & Endl.) Pridgeon & M.W. Chase 2001; Humboltia tricarinata (Poepp. & Endl.) Kuntze 1891; Pleurothallis acutangula H.Wendl. & Kraenzl. 1900; Pleurothallis trialata Rolfe 1907; Pleurothallis triptera Schltr. 1922
References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1854 as P tripteris; Xenia Orchidaceae vol 2 Rchb.f 1865 drawing fide; Xenia Orchidaceae Vol 3 Reichenbach as P acutangula drawing; Die Orchideen Schlechter 1915 as P platystachys; Systematics of Pleurothallis Vol 3 Luer 1986; Icones Orchidacearum Peruviarum Plate 167 Bennett & Christenson 1993 drawing ok; Orchids of the High Mountain Atlantic Rainforest in SE Brazil Warren & Miller 1994 as P platystachys; Orchids of Bolivia Vasquez & Ibisch Vol 1 2000 drawing fide; Orchids of Bolivia Vasquez & Ibisch Vol 1 2000 as P triptera; Lindleyana Vol 16 No 4 2001 as Acianthera tricarinata; Icones Pleurothallidinarum Vol XXVI Luer 2004 Drawing ok; Anales Jard. Bot. Madrid 75(1)e069: 13 2018 A taxonomic synopsis of Acianthera (Orchidaceae: Pleurothallidinae) in Peru, including two new species Damian, Chiron and Mitidieri 2018 as Acianthera tricarinata photo fidePleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 as Acianthera tricarinata photo fide
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