FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Orchidaceae Dendrobium williamsonii Rchb.f. ? (Sect. Nigrohirsutae). (vel D. ochraceum De Wild., D. virgineum Rchb.f.).
Vietnam, Quang Binh Prov., Bo Trach Distr., Hung Trach Municipality, Khe Me locality, around point 17°27′51′'N, 106°22′46′'E at elev. 900-1000 m a.s.l.
Slightly logged primary closed broad-leaved evergreen forest on slopes of mountains composed with shale and sandstone.
Epiphyte (Dracontomelon duperreanum, Bischofia javanica, Michelia sp., Chisocheton paniculatus, Cinnamomum sp., Pometia pinnata, Pterospermum spp., Duabanga grandiflora) in shady places along stream. Very common.