Medium sized epiphyte. Pseudobulbs oblong, to 8 cm long, compressed. Leaves 1 or 2, strap-like, to 25 cm long, to 4 cm wide. Flowers many, to 6 cm wide, brown with yellow edging; autumn. Sepals unequal, laterals smaller than dorsal. Petals larger than sepals, almost round. Labellum almost round, obscurely 3-lobed, margins wavy, resembling petals.

Brazil.

Source: Jeanes, J. (2005). Orchidaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press. (as Oncidium forbesii)