Oncidium longicornu Mutel 1838 SECTION Rhinocerotes

Closer Photo courtesy of Dalton Holland Baptista

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Common Name The Long-Horned Oncidium

Flower Size 2/5" [1 cm]

Found in Minas Gerais, Rio de Janiero, Sao Paulo, Parana, Santa Catarina and Rio Grande do Sul states of Brazil in the southeast Atlantic forest at elevations of 500 to 1800 meters, in shaded and humid places as a small sized, warm to cool growing epiphyte with clustered, oblong-conical, slightly compressed, ridged pseudobulbs carrying 1 or 2 apical, erect, rigid, oblong to oblong-ligulate, subacute leaves that are deep green above and paler below and blooms in the spring, summer and fall on a basal, 10 to 18" [25 to 45 cm] long, paniculate inflorescence with 6 to 10, spreading, subdistichous, slender branches carrying 7 to 20 flowers each, all held in the apical half and having membraneous floral bracts.

Synonyms Coppensia longicornu (Mutel) F.Barros & V.T.Rodrigues 2010; Gomesa longicornu (Mutel) M.W.Chase & N.H.Williams 2009; Gomesa rhinoceros (Rchb.f.) M.W.Chase & N.H.Williams 2009; Oncidium gautieri Regel 1868; Oncidium longicornu var. gautieri (Regel) Cogn. 1905; Oncidium longicornu var. grossmannii Dammer 1907; Oncidium monoceros Hook. 1841; Oncidium rhinoceros Rchb.f 1856; Oncidium unicorne Lindl. 1839; Oncidium unicornutum Knowles & Westc. 1838; Rhinocidium longicornu (Mutel) Baptista 2006; Rhinocerotidium longicornu (Mutel) Szlach. 2006; Rhinocerotidium rhinoceros (Rchb.f.) Szlach. 2006

References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915 as O unicorne; Atlas des Orchidees Cultivees Constantin 1920 as O unicorne drawing good; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium rhinoceros drawing good; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922; Das Pflanzanreich Regni Vegetabilis Conspectus Odontoglossum/Oncidium Kranzlin 1922 as Oncidium unicorne; AOS Bulletin Vol 27 No 5 1958 drawing; Encyclopedia of Cultivated Orchids Hawkes 1965 as O unicorne; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997; Rudolf Schlechter Die Orchideen Lieferung 33-6 1997 as O rhinoceros; 100 Orquideas Argentinas Freuler 2005 photo fide; The Pictoral Encyclopedia of Oncidium Zelenko 2002; Oncidium Vol 1 Koniger 2004 Photo/drawing; Orchid Species Culture: Oncidium, Bakers 2006; Orchids of Brazil Vol 1 Oncidinae Baptista, Harding & Neto 2011 as Coppensia longicornu photo fide

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