Bulbophyllum trigonopus

Bulbophyllum trigonopus is found in Thailand, penninsular Malaysia and Borneo in tall, low and open forests at elevations of sea level to 100 meters as a miniature to small sized, hot growing epiphyte with .3 to 2.5 cm between each distinct, ovoid to ellipsoid, hardly angular to obtusely 4 to 5 angled pseudobulbs carrying a single, apical, erect, ovate, obovate to elliptic, obtuse, petiolate base leaf that blooms on an obliquely erect to patent, peduncle with about 4 scales, 4.5 to 6.5 cm long, rachis porrect, 1 to 2 mm long, sumbumbellate, racemose, 5 to 10 flowered inflorescence.

Synonyms  Bulbophyllum pulchellum Ridl. 1907; Bulbophyllum pulchellum var. brachysepalum Ridl. 1907; Bulbophyllum pulchellum var. purpureum Ridl. 1907