Oncidium riograndense Cogn. 1906 SECTION Waluewa

Photo by Luis Felipe Varella

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Photo by Dalton Holland Baptista

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Common Name Riogrande Oncidium [A Brazilian State]

Flower Size 3/4" [2 cm]

Found in Espirito Santo, Rio de Janiero and Sao Paulo states of Brazil and northeastern Argentina at elevations of 300 meters as a small sized, warm to cool growing epiphyte with elongate elliptical to cylindrical smooth pseudobulbs partially enveloped basally by a few pairs of dry, thin, leafless bracts and carrying 2 apical, narrowly elliptic, acute, shortly condplicate below into the petiole-like base that blooms in the late spring on an axillary, ascending to arcuate spreading, paniculate, short, slender, arching, branched, 12" + [30 cm] long, many flowered inflorescence arising on a mature pseudobulb through the dry sheath.

Synonyms Baptistonia cassolana (V.P.Castro & Campacci) Chiron & V.P.Castro 2004; Baptistonia riograndense (Cogn.) Chiron & V.P.Castro 2004; Gomesa riograndensis (Cogn.) M.W.Chase & N.H.Williams 2009; Oncidium cassolanum V.P.Castro & Campacci 2001

References W3 Tropicos, Kew Monocot list , IPNI ; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 drawing fide; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Oncidium Vol 2 Koniger 2005 photo/drawwing fide; 100 Orquideas Argentinas Freuler 2005 photo fide; Orchid Species Culture: Oncidium, Bakers 2006 as Baptistonia riograndense; Icones Orchidacearum Brasilienses II Plate 103 Castro 2006 as Baptistonia x cassolana drawing/photo ok; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Baptistonia riograndensis photo fide

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