Oncidium sphacelatum Lindl. 1841 SECTION Oblongata
Photo by © Jay Pfahl
Photo by © Weyman Bussey
Oncidium sphacelatum var. minus Lindl . 1841
Photo by © Ramiro Merida
to 
Common Name The Burnt Spot Oncidium
Flower Size to 1" [to 2.5 cm]
Found in Mexico, Guatemala, Belize, El Salvador, Honduras, Nicaragua, Costa Rica and Venezuela at elevations below 1000 meters as 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 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 carrying showy, weakly fragrant flowers.
Synonyms Oncidium schrautianum Königer 2009; Oncidium sphacelatum f. xanthinum Roeth & O.Gruss 2006; 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; AOS Bulletin Vol 36 #9 1967 photo fide; AOS Bulletin Vol 37 No 1 1968 photo fide; Flora de Venezuela Volumen XV Part 5 Foldats 1970 drawing good; Las Orquedias De El Salvador Vol 2 Hamer 1974 drawing/photo fide; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 O martianum drawing fide; AOS Bulletin Vol 48 No 5 1979; Orquídea (Mexico City), n.s., 7[3]: 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 good; Icones Planetarum Tropicarum plate 1060 Dodson 1984 drawing ok; AOS Bulletin Vol 56 No 9 1987 photo ok; An Introdution to the Orchids of Mexico Wiard 1987 photo fide; Orchids Travel By Air A Pictoral Safari Mulder, Mulder-Roelfsema and Schuiteman 1990 photo good; Icones Orchidacearum I Plate 78 Hagsater & Salazar 1990 drawing ok; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 photo fide; AOS Bulletin Vol 62 No 10 1993 postage stamp fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 as O martianum; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997; Guatemala Y Sus Orquideas Behar & Tinschert 1998 photo fide; AOS Bulletin Vol 69 No 5 2000 photo fide; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 drawing good; AOS Bulletin Vol 70 No 3 2001 photo fide; Harvard Pap. Bot. 5 #2: Carnevali etal. 2001; AOS Bulletin Vol 71 No 4 2002 photo fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002; AOS Bulletin Vol 72 No 7 2003 photo fide; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003; AOS Bulletin Vol 75 No 9 2006 photo fide; 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 fide; AOS Bulletin Vol 81 #6 2012 photo fide; Guia de Orquideas de Chiapas Carlos Rommel Beutelspacher Baigts 2013 photo good; Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018; Orchid Digest Vol 83 #3 2019 photo fide; AOS Bulletin Vol 89 #11 2020 photo fide;
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