Cyrtochilum flexuosum Kunth 1816 SECTION Cimicifera Lindley
Photo by © Alexander Reynolds and The University of California Davis Campus Website
Photo by © Lourens Grobler
Photo by © Karl Senghas
Common Name The Flexed Cyrtochilum [refers to the lip]
Flower Size .6" [1.4 cm]
Found in Colombia, Ecuador and Peru at elevations of 1700 to 3000 meters as a medium to large sized, cool to cold growing epiphyte with light green, laterally compressed, deeply longitudinaly grooved pseudobulbs enveloped partially below by several pairs of imbricate, leaf bearing sheaths and carrying 2, apical, thin, fairly stiff, strap shaped, acute, conduplicate leaves that blooms in the fall and winter on an axillary, stout, slightly compressed, to 59" [150 cm] long, erect to arching, paniculate, few to many, fractiflex branched, many flowered inflorescence arising on a recently matured pseudobulb with each branch being 12" [30 cm] long, that rebranch secondarily with up to seven separate branches with each carrying 4 to 8 flowers.
Said to be a highly variable species in flower form. The first photo matches the drawings that I have exactly, the second may be the same species but I cannot prove it.
Synonyms Cyrtochilum hartwegii (Lindl.) Kraenzl. 1917; Cyrtochilum hartwegii var. parviflorum (Rchb.f.) Kraenzl. 1922; Cyrtochilum trulla (Rchb.f.) Kraenzl. 1917; Oncidium flexuosum (Kunth) Lindl. 1841; Oncidium hartwegii Lindl. 1845; Oncidium hartwegii var. parviflorum Rchb.f. 1870; Oncidium micranthum Skinner ex Lindl. 1855; Oncidium trulla Rchb.f. 1854; Trigonochilum flexuosum (Kunth) Königer & Schildh. 1994; Trigonochilum trulla (Rchb.f.) Königer & Schildh. 1994
References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1854 as Oncidium trulla; Bonplandia Rchb.f 1855 as Oncidium trulla; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 drawing fide; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 as C hartwegii drawing fide; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 as C trulla drawing ok; Orchids of Peru Vol 4 Schweinfurth 1961 as Oncidium trulla; Icones Planetarum Tropicarum Plate 473 Dodson 1982 as Oncidium exasperatum not drawing good; The Manual of Cultivated Orchids Bechtel, Cribb, Launert 1992 as C microchilum photo fide; Icones Orchidacearum Peruviarum Plate 334 Bennett & Christenson 1995 as Oncidium cocciferum drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 as Trigonidium cocciferum drawing good; Lindleyana Vol 16 No 2 2001; Native Ecuadorian Orchids Vol 4 Dodson 2003 as Oncidium flexuousum drawing not = C tanii/photo fide; Orquideologia Vol. 23 No 2 2004 as Oncidium trulla; Orquideologia Vol 23 #2 2004 as O hardweggii; Orchid Species Culture; Oncidium/Odontoglossum Alliance Bakers 2006; Orquideologia Vol 25 #2 2008; Flora of Ecuador No 87 225[3] Orchidaceae Dodson & Luer 2010 drawing fide; Orchids of the Department of Valle de Cauca Colombia Vol 4 Kolanowska and Szlachetko 2016 as Trigonochilum flexuosum drawing good; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 drawing/photo fide; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 as C trulla photo fide
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