~Oncidium macronyx Rchb. f. 1881 - See Oncidium longicornu Mutel 1838 SECTION Rhinocerotes Photo by © Lourens Grobler
Inflorescence Photos by © Americo Docha Neto
to 
Common Name The Large Clawed Oncidium [refers to the callus shaped like a claw]
Flower Size 3/4" [2 cm]
Found in south of Brazil (Santa Catarina, Rio Grande do Sul), Paraguay, Argentina in low montane rainforest; hot, humid lowlands as a small sized, warm to cool growing epiphyte with clustered, oblong-conical, slightly compressed, ridged pseudobulbs partially enveloped basally by a few papery sheaths carrying 1 or 2 apical, curved, rigid, oblong to oblong-ligulate, subacute leaves that blooms in the spring, summer and fall on a basal, 14 to 22" [35 to 55 cm] long, paniculate inflorescence arising on a newly matured pseudobulb with spreading, subdistichous, slender branches and membraneous floral bracts.
This orchid is often confused with the Oncidium longicornu Mutel, by which it is very similar but differs in the format of the lip and calli of the labellum .
Synonyms Coppensia macronyx (Rchb.f.) F.Barros & V.T.Rodrigues 2010; Gomesa macronyx (Rchb.f.) M.W.Chase & N.H.Williams 2009; Rhinocerotidium macronyx (Rchb.f.) Szlach. 2006; Rhinocidium macronyx (Rchb.f.) Baptista 2006
References W3 Tropicos, Kew Monocot list , IPNI ; Otia Botanica Hamburgensia Rchb.f 1881; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 drawing ok; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 drawing fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 33 - 36 2057 - 2308 Brieger 1997 drawing/photo fide; Australian Orchid Review Vol 66 No 2 2001 photo; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Oncidium Vol 1 Koniger 2004 photo/drawing as O longicornu; Orchid Species Culture: Oncidium, Bakers 2006; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Coppensia longicornu photo hmm
--------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------
