FLORA OF LAOS Orchidaceae Bulbophyllum nigrescens Rolfe
Xiangkhouang Prov., Peak Distr., Khoang village, Pa Khao mt., around point 19°33′02.2′N 103°39′56.3′E.
Primary and secondary broad-leaved evergreen dry forest on solid rocky highly eroded limestone at elev. 1200-1450 m a.s.l.
Short creeping, clustering epiphyte on tall mossy tree. Sepals yellowish with purple-brown nerves, petals almost black, lip greenish with dull brow-green apical part. Not rare.