!Cyrtochilum undulatum Kunth 1816 SECTION Eucyrtochilum Kranzlin

Photo by © Jay Pfahl

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Photo by © Arturo Carillo


Drawing by © Humboldt and Humboldt Digital Library Website

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Common Name The Undulate Cyrtochilum

Flower Size 1.6" [4 cm]

Found in Colombia, Venezuela, Ecuador and Peru in cloud forests in dense vegetation in thin soil at elevations of 1500 to 3500 meters as a giant sized, cool to cold growing terrestrial or lithophyte with 2 to 12" between each oblong to ovoid, smooth, subcompressed pseudobulbs enveloped by 2 to 3, imbricate, leaf bearing sheaths and carrying subcoriaceous, carrying oblanceolate to linear-oblanceolate, light to medium green, shallowly grooved above and slightly keeled below into the base leaves that blooms in the summer on a paniculate, 3.4" to 13' 4" [1 to 4 meters] long, twining, flexuous, to 8" [20 cm] between each branch, each branch 8 to 10 flowered, many flowered inflorescence arising on a newly maturing pseudobulb with small, ovate-triangular floral bracts.

Pers. Comm. Stig Dalstrom, "Yes Jay, that it what is described as “Oncidium” (= Cyrtochilum) ventilabrum, which I believe is a synonym of Cyrtochilum undulatum (the type for the genus)." Kew still has this as a separate entity form C ventrilabrum but I have made C ventrilabrum a synonym of C undulatum per Stig's suggestion.

Synonyms Cyrtochilum carderi (Rchb.f.) Kraenzl. 1917; Cyrtochilum ventilabrum (Rchb.f. & Warsz.) Kraenzl. 1917; Oncidium carderi Rchb.f. 1875; Oncidium undulatum Lindl. 1841; *Oncidium ventilabrum Rchb.f. & Warsz. 1854

References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1854 as Oncidium ventilabrum; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 as Oncidium ventilabrum drawing fide; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922 as C carderi drawing good; Das Pflanzenreich Odontoglossum/Oncidium Kranzlin 1922; Orchids of Peru Vol 4 Schweinfurth 1961 as Oncidium ventrilabrum; Venezuelan Orchids Illustrated Vol 3 Dunsterville & Garay 1965 as Oncidium detortum = C undulatum? drawing good; Venezuelan Orchids Vol 4 Dunsterville & Garay 1966 as Oncidium carderi not = C orgyale; Flora de Venezuela Foldats Volumen XV Part 5 1970 as Oncidium carderi not = C orgyale; Orchids of Venezuela An Illustrated Field Guide Vol 2 H-O, Dunsterville & Garay 1979 as Oncidium detortum not = C undulatum drawing good; Native Colombian Orchids Vol 1 COS 1990 as C carderi photo fide; Icones Orchidacearum Peruviarum Plate 146 Bennett & Christenson 1993 as C ventilabrum drawing ok; Orchid Digest Vol 60 No 2 1996 as C carderi photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 as C carderi; AOS Bulletin Vol 67 No 1 1998 as C carderi photo ?; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 as Oncidium detortum drawing hmm = C undulatum; Lindleyana Vol 16 No 2 2001 as C ventilabrum; The Pictoral Encyclopedia of Oncidium Zelenko 2002 drawing not = C orgyale; Native Ecuadorian Orchids Vol 4 Dodson 2003 as Oncidium ventrilabium drawing/photo fide; Orquideas Nativas del Tachira Cesar Fernandez 2003 as C detortum photo fide; Orchid Species Culture Oncidum/Odontoglossum alliance Bakers 2006 as C ventiolabrum; Orchid Species Culture: Oncidium/Odontoglossum alliance Bakers 2006; ; Orquideologia Vol 25 #2 2008; Orchid Species of Peru Zelenko Bermudez 2009 as C ventilabrum photo fide; Flora of Ecuador No 87 225[3] Orchidaceae Dodson & Luer 2010 as C ventilabrum drawing fide; Flora of Ecuador No 87 225[3] Orchidaceae Dodson & Luer 2010; Orchid Digest Vol 75 #4 2011 as C ventilabrum Photo fide; Orquideas Del Valle De Aburra Medellin Colombia COS 2014 photo hmm; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 drawing ok; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 as C ventrilabrum drawing/photo fide; AOS Bulletin Vol 86 #3 2016 drawing ok; Orchids of the Department of Valle de Cauca Colombia Vol 4 Kolanowska and Szlachetko 2016 as C ventilabrum drawing good; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 drawing fide; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 as C ventrilabium drawing/photo fide