S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, S slope of Bach Ma mt below Hai Vong Dai peak, around point 16°11′11′'N 107°50′57′'E at elev. about 1050 m a.s.l.
Mixed and broad-leaved evergreen dry secondary mt forest on very steep shale/sandstone slopes. Epiphyte in shady stream canyon. Rare.
HLF 1316a 23 April 2003.
Coll. L.Averyanov, N.X.Tam, N.T.Vinh. Grant from Henry Luce Foundation.