Robust epiphyte or epilith. Pseudobulbs compressed-ovoid, to 25 cm long. Leaves 5?8, elliptic to obovate, to 60 cm long, to 10 cm wide. Flowers 20-90, to 6 cm wide, green to yellow with brown blotches; mostly spring to summer. Sepals and petals lanceolate to obovate, petals slightly smaller. Labellum hairy at base, callus of 3 yellow ridges.

New Guinea.

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.