Oncidium sphacelatum Lindl. 1841 SECTION Oblongata Photo courtesy of Jay Pfahl

En Situ in Mexico Photo courtesy of Weyman Bussey

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Common Name The Burnt Spot Oncidium

Flower Size to 1" [to 2.5 cm]

This is a giant sized, hot to warm growing epiphyte and occasional lithophyte with compressed, oblong pseudobulbs carrying 2 to 3, linear-ligulate, suberect, rigid, acute leaves found in tropical and mountain rain forests occuring in Mexico, Guatemala, Belize, El Salvador, Honduras, Nicaragua, Costa Rica and Venezuela where it is found below 1000 meters and blooms in the spring with a basal, to 6' [180 cm] long, lateral to pendulous, short branched, purple mottled panicle arising from the leaf bearing sheaths of a mature pseudobulb that has triangular bracts and many showy, weakly fragrant flowers.

Synonyms Oncidium massangei C. Morr. 1977; Oncidium sphacelatum var. majus Lindl 1841; Oncidium sphacelatum var. minus Lindl 1841; Oncidium stenostalix Rchb.f ex Kraenzel. 1922

References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1856; Die Orchideen Schlechter 1915; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium martianum; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium stenostalix; AOS Bulletin Vol 29 No 11 1960 photo; AOS Bulletin Vol 30 No 9 1961; Encyclopedia of Cultivated Orchids Hawkes 1965; Venezuelan Orchids Vol 4 Dunsterville & Garay 1966 drawing good; Flora de Venezuela Foldats Volumen XV Part 5 1970 drawing good; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide; AOS Bulletin Vol 48 No 5 1979; Orchids of Venezuela An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 drawing good; Orchid Digest Vol 44 No 2 1980 photo ok; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing hmm; AOS Bulletin Vol 52 No 10 1983 photo; Icones Planetarum Tropicarum plate 1060 Dodson 1984 drawing ok; AOS Bulletin Vol 56 No 9 1987 photo; Icones Orchidacearum I Plate 78 Hagsater & Salazar 1990 drawing ok; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 as O martianum; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; AOS Bulletin Vol 69 No 5 2000 photo; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 drawing good; AOS Bulletin Vol 71 No 4 2002 photo; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003; AOS Bulletin Vol 75 No 9 2006 photo; Orchid Species Culture: Oncidium, Bakers 2006; Oncidium Vol 3 Koniger 2007 photo/drawing fide; AOS Bulletin Vol 77 No 3 2008 photo; AOS Bulletin Vol 77 No 10 2008 photo;

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