Hemiepiphytic or lithophytic rhizomatous orchid with leaves to 520mm x 55mm. Twining flower scapes to 6m with floral bracts to 45mm long, brown flowers edged yellow to 70mm wide with chestnut brown sepals with yellow border, dorsal sepal to 30mm x 26mm, lateral sepals longer & narrower, petals shorter yellow spotted brown, 3-lobed lip to 230mm x 11mm.