Oncidium bicameratum Rchb.f. 1922 SECTION Oncidium

Photo by Patricia Harding


Common Name The Two-Chambered Oncidium [refers to the 2 superposed concavities Reichenbach saw on the tabula of the column of a preserved flower which is a feature not visible in living material]

Flower Size 1.2" [3cm]

Found in Morona-Santiago province of Ecuador at elevations around 1500 meters as a medium sized, cool growing epiphyte with narrowly ovate, laterally compressed, ancipitous pseudobulbs partially enveloped below by a pair of leaf-bearing sheaths and carrying 1 to rarely 2, apical, oblong-lanceolate, obtuse, conduplicate below into the base leaves that blooms on an erect to nodding, peduncle shorter than the rachis, 3 to 8 branched, paniculate inflorescence with short branches carrying 2 to 5, faintly fragrant flowers.

CAUTION Said by Kew and others to be a synonym of O bauerii but if the determination above is correct then they are quite different I leave them separate pending better references.


References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Oncidium Vol 1 Koniger 2004 photo/drawing fide; Orchid Species Culture: Oncidium, Bakers 2006 erroneoulsy as a Syn of O baueri; Oncidium Vol 3 Koniger 2007 as a Syn of O baueri