FLORA OF VIETNAM Orchidaceae Dendrobium williamsonii
N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Ca Thanh (N 22°44′ E 105°50′). Primary evergreen broad-leaved forest on steep slopes and bluffs of remnant karst limestone ridge at 1400 m elev. Epiphyte in open places. Flowers: tepals yellowish-white, lip yellowish-white, base of epichile orange-pink with white hairs, tips of lip sides pink-orange. Rare.
CBL 1311 13 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)