FLORA OF VIETNAM Orchidaceae Dendrobium williamsonii Day & Rchb.f.
Vietnam, Quang Binh Prov., Minh Hoa Distr., Dan Hoa municipality, Giang Man Mountain, Vietnam-Laotian border, about 6 km to N of Cha Lo borders station, around point 17°41′09″N 105°45′54″E.
Coniferous primary forest with Dacrydium and Fokienia along ridge edge composed with brown shale at elevation 1000-1100 m a.s.l.
Epiphyte on tall tree. Flowers light yellowish, lip with orange center. Not common.
HAL 11716 19 April 2008 photo Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, N.S.Khang