Cyrtochilum tricostatum Kraenzl. 1922 SECTION Cimicifera Lindley

Another Flower? Photo by © Lourens Grobler

Common Name The Three Ribbed Cyrtochilum

Flower Size.6" [1.5 cm]

Found in Ecuador and Peru on mossy trees or on steep slopes as a terrestrial at elevations of 2000 to 3000 meters as a medium sized, cold growing epiphyte or terrestrial with ovoid to narrowly pear-shaped, laterally compressed pseudobulbs partially enveloped basally by seeral sets of imbricating, leaf-bearing sheaths and carrying 2, apical, narrow, acute,strap-shaped to lanceolate, conduplicate below into the base leaves that blooms in the summer and fall on an axillary, 20 to 31" [50 to 80 cm] long, many flowered, paniculate inflorescence with short, spreading, fractiflex branches and arising on a maturing pseudobulb.

The first photo matches the photo in Native Ecuadorian Orchids exactly.

Synonyms Irenea tricostata (Kraenzl.) Szlach., Mytnik, Górniak & Romowicz 2006; Oncidium ovatilabium C. Schweinf. 1946; Oncidium tricostatum (Kraenzl.) Garay 1970; Trigonochilum tricostatum (Kraenzl.) Königer & Schildh 1994

References W3 Tropicos, Kew Monocot list , IPNI ; *Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922; Icones Planetarum Tropicarum Series II Orchids of Peru Plate 0146 Dodson & Bennett 1989 as Oncidium tricostatum drawing fide; Icones Orchidacearum Peruviarum Plate 340 Bennett & Christenson 1995 drawing fide; Icones Orchidacearum Peruviarum Supplemental Plate Bennett & Christenson 1998 drawing fide; Lindleyana Vol 16 No 2 2001; Native Ecuadorian Orchids Vol 4 Dodson 2003 as Oncidium tricostatum photo fide; Orchid Species Culture: Oncidium, Bakers 2006; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Flora of Ecuador No 87 225[3] Orchidaceae Dodson & Luer 2010 drawing fide

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