Robust epiphyte. Pseudobulbs oblong to almost spherical, to 12.5 cm long, compressed, furrowed. Leaves 2, lanceolate to elliptic, to 45 cm long, to 7 cm wide. Flowers 5-15, to 13 cm wide, green with dark purple or black markings on the labellum; autumn. Sepals and petals similar, lanceolate to ovate. Labellum 3- lobed, midlobe with wavy margins. Plants available under this name may be hybrids.

Malaysia and Indonesia.

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.