Oncidium bifolium Sims 1812 SECTION Synsepala Photo courtesy of Dalton Holland Baptista Photo by Martin Batiti and Orchidstudium

Another Flower? Photo courtesy of Dario Melgar

to LATE EARLY

Common Name The Two-Leaf Oncidium

Flower Size 3/4" to 1" [2 to 2.5 cm]

Found in Bolivia, Parana, Santa Catarina and Rio Grande do Sul Statees of Brazil, Uruguay and Argentina in hot lowlands along shady streams, to cooler montane forests at elevations of 100 to 800 meters as a small sized, cool growing epiphyte with ovoid or ovoid-oblong, deeply sulcate with age pseudobulbs carrying 1 or rarely 2 apical, slightly coriaceous, linear-oblong, acute leaves that blooms in the late winter and early spring on an axillary, often nodding, 9 to 12" [20 to 35 cm] long, few to several [5 to 20] flowered, racemose or rarely paniculate inflorescence with rigid, narrowly triangular, acute floral bracts occuring in the late winter and early spring. Grow in a pot in warm to cool temperatures, with moderate shade, high humidity and a lessening of water in the winter.

Synonyms Ampliglossum bicolor (Lindl.) Campacci 2006; Ampliglossum bifolium (Sims) Campacci 2006; Coppensia bicolor (Lindl.) Campacci 2006; Coppensia bifolia [Sims] Dumort. 1835; Gomesa bicolor (Lindl.) M.W.Chase & N.H.Williams 2009; Gomesa bifolia (Sims) M.W.Chase & N.H.Williams 2009; Gomesa chrysothyrsus (Rchb.f. ex R.Warner) M.W.Chase & N.H.Williams 2009; Oncidium batemanianum Griseb 1879; Oncidium bifolium var. majus hort. ex B.S. Williams; Oncidium beyrodtianum Schltr 1910; Oncidium celsianum A.Rich 1844; Oncidium chrysothyrsus Rchb.f. ex R.Warner 1865; Oncidium maculosum Lindl 1837; Oncidium martianum var bicolor Lindl. 1837

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 bicolor; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O chrysothyrsus drawing ok; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as O celsianum; Venezuelan Orchids Illustrated Vol 3 Dunsterville & Garay 1965 as O bicolor drawing ok; Encyclopedia of Cultivated Orchids Hawkes 1965; Flora de Venezuela Foldats Volumen XV Part 5 1970 as O bicolor drawing good; Orchids of Venezuela An Illustrated Field Guide Vol 2 Dunsterville & Garay 1979 as O bicolor drawing ok; Orchid Digest Vol 44 no 2 1980 photo ok as O chrysothyrsus; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 photo hmm; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 as O bicolor photo fide; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 as O bicolor drawing ok; The Pictoral Encyclopedia of Oncidium Zelenko 2002; The Pictoral Encyclopedia of Oncidium Zelenko 2002 as O bicolor; Orquideologia Vol. 23 No 2 2004 as O bicolor; Oncidium Vol 1 Koniger 2004 photo/drawing ok; Orchids of The Brazilian Central Plateau Menezes 2004 photo fide; 100 Orquideas Argentinas Freuler 2005 photo ok; Oncidium Vol 2 Koniger 2005 as O bicolor; Orchid Species Culture: Oncidium, Bakers 2006; Orchid Species Culture; Oncidium Bakers 2006 as O bicolor; AOS Bulletin Vol 76 No 8 2007 Photo as Coppensia bifolia; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Coppensia bifolia photo fide

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