Bulbophyllum mandibulare (species)
Found only in Sarawak and Sabah, Borneo in lowland riverine forests at elevations of 300 to 2100 meters as a small-sized, hot to cool growing epiphyte with clustered, narrow ellipsoid, glaucous pseudobulbs carrying a single, apical, oblong-lanceolate, obtuse, gradually narrowing below into the elongate, petiolate base leaf leaf that blooms twice a year on a slender, erect to arching, to 8 " [to 20 cm] long, laxly few, successively 1 to 2 flowered inflorescence with long-lasting, large, fleshy flowers.