FLORA OF VIETNAM Orchidaceae Juss. Tropidia angulosa (Lindl.) Blume
N. Vietnam, Bac Can prov., Ba Be distr., Ba Be national park (22°24′44′'N, 105°38′05′'E). Primary dry broad-leaved evergreen forest (with Burettiodendron hsienmu as a main dominant) on very steep slopes of remnant highly eroded limestone ridge at elev. 400-450 m a.s.l. Terrestrial herb on steep shady slope. Not common.