Catasetum callosum Lindley 1840 SUBGENUS Catasetum SECTION Isoceras SUBSECTION Divaricatae
Green Color Form Photos by © Jean Finalle
Fatter Flower Form Photo by © JEM Orchids
LATE 
and
Common Name The Callused Catasetum
Flower Size 2" [5 cm]
A medium sized, hot growing Colombian and Venezuelan epiphytic species occurring at elevations around 346 meters on bushes in dry open forests with fusiform pseudobulbs enveloped basally by leaf sheaths and carrying 5, linear-lanceolate, medium green, plicate leaves and blooms in the late summer, fall and winter on a basal, arching, 12" [30 cm] long, several [10 to 15] flowered, racemose inflorescence with fragrant, inverted flowers arising on a mature pseudobulb.
This species requires a dry, fertilizerless rest in the winter.
Synonyms Catasetum acallosum Lindl. ex Rchb. f. 1854; Catasetum arachnoides Ames 1898; Catasetum callosum var. carunculatum (Rchb.f. & Warsz.) Mansf. 1932; Catasetum callosum var crenatum Regel 1853; Catasetum callosum var crenulatum Mansf. 1942; Catasetum callosum var grandiflorum Hkr. 1846; Catasetum carunculatum Rchb. f. & Warsz. 1854; Catasetum darwinianum Rolfe 1889; Catasetum fuliginosum Rolfe 1887; Catasetum fuliginosum Lindl. 1841; Catasetum lansbergii [Rein. & Vriese] Lindl. & Paxton 1850-1; Myanthus callosus Beer 1854; Myanthus grandiflorus Beer 1854; Myanthus lansbergii Reinw. & de Vriese 1851
References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1854 as C callosum; Die Orchideen Schlechter 1915; Flora Brasilica Vol XII VI Hoehne 1942 as C arachnioides; Flora Brasilica Vol XII VI Hoehne 1942 drawing fide; Flora Brasilica Vol XII VI Hoehne 1942 as C callosum var crenulatum; AOS Bulletin Vol 26 #8 1957 drawing fide; Orchids of Peru Vol 3 Schweinfurth 1960; Venezuelan Orchids Vol 2 Dunsterville & Garay 1961 drawing fide; Encyclopedia of Cultivated Orchids Hawkes 1965; AOS Bulletin Vol 36 # 9 1967; Flora de Venezuela Volumen XV Part 4 Foldats 1970 drawing fide; Orchidaceae Brasilensis Band 1 Pabst & Dungs 1975 drawing fide; Orchids of Venezuela, An Illustrated Field Guide Vol 1 Dunsterville & Garay 1979 drawing fide; Native Colombian Orchids COS Vol 1 1990 photo ok; Orchids Travel By Air A Pictoral Safari Mulder, Mulder-Roelfsema and Schuiteman 1990 photo fide; Rudolf Schlechter Die Orchideen Band 1B lieferung 26 1584 - 1648 Brieger 1992 photo fide; Rudolf Schlechter Die Orchideen Band 1B lieferung 26 1584 - 1648 Brieger 1992 as C arachnoideum; Native Colombian Orchids COS Vol 5 1994 phopto fide; Venezuela; Paraiso de Orquideas Romero 1997 photo ok; The World Of Catasetum Holtz 1999 photos fide; Orchids of Venezuela [An illustrated field guide] Vol. 1 Ramiro and Carnevali 2000 drawing fide; Orquideas Nativas del Tachira' Cesar Fernandez 2003 photo fide; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 drawing ok; AOS Bulletin Vol 76 No 5 2007 photo fide; Orquideologia Vol 26 No 1 2009 photo fide; Orchids, A Colombian Treasure Vol 1 Ortiz & Uribe 2014 drawing/photo fide; Orchid Digest Vol 80 #4 2016 photo fide;
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