FLORA OF VIETNAM Orchidaceae Bulbophyllum psychoon Rchb.f. = B. lockii Aver.
Dien Bien Prov., Tua Chua Distr., Sin Chai Municipality, around point 22°03′38”N 103°19′56”E.
Primary humid evergreen broad-leaved forest on very steep rocky slopes and on tops of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation 1350-1500 m a.s.l.
Epiphyte on mossy tree. Flowers light yellowish, lip purple. Not common.