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Oncidium fuscatum is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Cymbidieae, subtribe: Oncidiinae,  
Genus Oncidium 
Infraspecific taxa recognized within Oncidium fuscatum: infraspecific taxa
This species is found in Panama to Peru and N. Brazil.
Onc. fuscatum dark form David Haelterman
Onc. fuscatum Seiji Takahashi
Onc. fuscatum Roland Amsler
Onc. fuscatum Seiji Takahashi
Onc. fuscatum Gilberto Merino
Onc. fuscatum dark form David Haelterman
Onc. fuscatum Andreas Kay
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