Epiphyte; pseudobulbs +/- ovoid, compressed and ridged, densely clustered, ca 5 cm long and 3.5 cm wide, subtended by imbricating bracts; the bracts weathering into fibers. Leaves 2, from apex of pseudobulb, linear-lanceolate, 20-60 cm long, 1-3 cm wide, conduplicate at base. Inflorescences 1 to several, erect bracteated scapes bearing 1 flower, +/- the same height as leaves, arising from base of pseudobulb; sepals free, mostly acute, 3-4 cm long, faintly brown- to purple-striped, usually tan to yellow, the dorsal sepal erect, the laterals recurved at apices; petals much smaller, more prominently striate, purple and with a glandlike thickening near apex; lip thick, trilobate, recurved at apex, about a third as long as petals, the sides closely fit around the smaller column; column canaliculate on inner surface, the margins purple; anther solitary near apex; pollinia orange. Fruits narrowly ellipsoid, ca 5 cm long. Croat 8414. Abundant on tree stumps at the margin of the lake. Flowers from December to July, chiefly in the dry season months of January to March. Some fruits develop to mature size by late February and have been found unopened as late as early April.