FLORA OF VIETNAM Orchidaceae Paphiopedilum dianthum T.Tang et F.T.Wang
N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Ca Thanh, about 3 km to SW from Yen Lac village (N 22°44′ E 105°50′), about 42 km to NWW from Cao Bang town. Primary open coniferous mossy forest (with Pseudotsuga brevifolia in 1 stratum) along tops of limestone karst remnant ridge at 1400-1450 m alt. Epilite on open mossy rocks of SW exposition. Flower sepal and synsepalum white with greenish stripes at the base, lateral petals and lip olive-green, petals with small deep brown warts and groups of black hairs along margin. Rare.
CBL 394 18 Nov. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)