Bulbophyllum treschii

Common Name Tresch's Bulbophyllum [Original Cultivator of species current]

Flower Size 6.6" [16.5 cm] long

Found in Malaysia without locality but at elevations of 1000 to 1500 meters as a mini-miniature to miniature sized, cool growing epiphyte with a slowly creeping, branching rhizome giving rise to close set, conical-ovoid, tetragonal, concave side on older, slightly compressed pseudobulbs carrying a single, apical, erect to slightly spreading, leathery, rigid, dark green, oblong, acute to obtuse, apiculate, subpetiolate base leaf that blooms in the summer on a descending to pendent, to 6" [15 cm] long, 4 flowered inflorescence carrying simultaneously opening flower.

Very similar to B plumatum but differs in the wrinkled, rugose sepals and the lip that appears shorter, more darkly and heavily spotted and more squared off and obtuse at the apex.

Thanks to International Orchid Species Encylopedia