FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Orchidaceae Dendrobium thyrsiflorum Rchb.f.
Vietnam, Quang Binh Prov., Bo Trach Distr., Hung Trach Municipality, Khe Ba Tanh locality, around point 17°27′24′'N, 106°23′14′'E at elev. 600-700 m a.s.l.
Slightly logged primary closed broad-leaved evergreen forest on slopes of mountains composed with shale, sandstone and occasionally granite.
Epiphyte (on Dracontomelon duperreanum, Bischofia javanica, Michelia sp., Chisocheton paniculatus, Cinnamomum sp., Pometia pinnata, Pterospermum spp., Duabanga grandiflora) on shady slope of stream valley along stream. Not common.