Oncidium macropetalum Lindl. 1841 SECTION Barbata Photo courtesy of Jay Pfahl

Flower closeup Photo by © José Luis Panozo Añez

Flowering Inflorescence Photo courtesy of Weyman Bussey

and

Common Name The Large Petal Oncidium

Flower Size 1 1/4" [3.2 cm]

This miniature sized, warm growing species from Paraguay, Minas Gerais, Goias, Matto Grosso and Sao Paulo states of Brazil and Bolivia? is found in the hot lowlands and savannahs at elevations of 200 to 300 [1000] meters and has conical, somewhat laterally compressed, fluted pseudobulbs subtended by 1 to 2 leaf-bearing sheaths and carries 1 or 2, apical, arching, acute leaves and blooms in the winter and spring on an axillary, slender, arcuate to pendulous, 18" [40 cm] long, few to many flowered, paniculate inflorescence arising on a mature pseudobulb.

Supplying warm temperatures with moderate light, plenty of water while growing and less when not, as well as good air movement will ensure a happy plant.

Synonyms Alatiglossum macropetalum ( Lindl. ) Baptista 2006; Gomesa macropetala (Lindl.) M.W.Chase & N.H.Williams 2009; Oncidium juscopetalum Hoehne 1910; Oncidium macropetalum Lindl. var. micranthum G.F.J.Pabst 1977

References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 drawing good; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Orchids of The Brazilian Central Plateau Menezes 2004 photo fide; Orchid Species Culture: Oncidium, Bakers 2006; AOS Bulletin Vol 76 No 2 2007 photo; Oncidium Vol 3 Koniger 2007 photo/drawing fide; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 photo fide

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