Oncidium flexuosum C.Loddiges 1820 SECTION Synsepala
Photo by © Patricia Harding
Photo by © Luiz Filipe Varella
to 
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Common Name The Bent Oncidium
Flower Size from 3/4" to 1 1/2" [2 to 3 cm]
Found in Para, Pernambuco, Alagoas, Bahia, Espirito Santo, Minas Gerais, Rio de Janiero, Sao Paulo, Parana, Santa Catarina and Rio Grande do Sul states of Brazil, Argentina, Uruguay and Paraguay in the coastal mountains and along inland creeks and marshes at elevations of sea level to 1200 meters as a small to medium sized, cool to hot growing, epiphytic orchid that has narrowly ovoid or ovate-elliptic, compressed, ancipitous pseudobulbs carrying 2 apical, spreading, slightly coriaceous, narrowly oblong-ligulate, obtuse or abruptly acute leaves that blooms in the fall and winter on an erect to arcuate, to 5' [150 cm] long overall, stout, slightly compressed, dull purple, paniculate with 4 to 10, divaricate, to 12" [30 cm] long, ascending, zig-zag branches with to 10 flowers each, each branch can rebranch with up to 7 secondary branches, many flowered inflorescence with narrowly triangular, green with patches of brown and minute purple brown spots, very short, acute floral bracts and carrying many small flowers.
CAUTION Kew has O isopterum as a synpnym of this species but if I have the determination correct it is quite differnt so I have left it and its synonyms separate.
Synonyms Ampliglossum flexuosum (Lodd.) Campacci 2006; Coppensia flexuosa (Lodd.) Campacci 2006; Epidendrum lineatum Vell. 1831; Gomesa flexuosa (Lodd.) M.W.Chase & N.H.Williams 2009; Gomesa megaloptera (Kraenzl.) M.W.Chase & N.H.Williams 2009; Oncidium flexuosum Sims 1821; Oncidium flexuosum var. radiatum Rchb.f. 1872; Oncidium haematochrysum Rchb.f 1849; Oncidium haematoxanthum Rchb. f. ex Lindl. 1855; Oncidium megalopterum Kraenzl. 1922
References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915; Atlas des Orchidees Cultivees Constantin 1920 drawing ok; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium haematochrysum drawing good; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium megalopterum; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Encyclopedia of Cultivated Orchids Hawkes 1965; Die Orchideen #1 1-4 tafel 1&2 Rudolph Schlechter 1971 photo plant only; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 drawing fide; AOS Bulletin Vol 47 No 6 1978 photo fide; Orchid Digest Vol 44 No 2 1980 photo ok; AOS Bulletin Vol 56 No 1 1987 drawing fide; Orchids Travel By Air A Pictoral Safari Mulder, Mulder-Roelfsema and Schuiteman 1990 photo fide; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 photo good; Orchid Digest Vol 63 #1 1999 photo fide; Australian Orchid Review Vol 66 No 2 2001 photo; Australian Orchid Review Vol 66 No 6 2001 photo; AOS Bulletin Vol 70 #11 2001 photo fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Native Ecuadorian Orchids Vol 4 Dodson 2003 as Oncidium exasperatum not drawing fide; Oncidium Vol 1 Koniger 2004 drawing/photo fide; Oncidium Vol 2 Koniger 2005; 100 Orquideas Argentinas Freuler 2005 photo ok; Orquideas Da Chapada Diamantina Brito & Cribb 2005; Orchid Species Culture: Oncidium/Odontoglossum alliance Bakers 2006; Orchid Species Culture: Oncidium/Odontoglossum alliance Bakers 2006 as C hartwegii; AOS Bulletin Vol 76 No 8 2007 as Coppensia flexuosa photo fide; AOS Bulletin Vol 76 #12 2007 photo fide; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Coppensia flexuosa photo fide; Orquideas de Zamora Chinchipe Tomo 1 Epidendroideae I Jimenenz 2014 photo fide; Lankesteriana 19(3) 2019 drawing fide;
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