S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, Bach Ma mt, about 12 km to the W from headquarter to Hai Vong Dai peak, around point 16°11′65′'N 107°51′53′'E at elev. about 800 m a.s.l.
Mixed and broad-leaved evergreen primary closed mt forest on steep granite slopes. Terrestrial herb on shady steep slope. Not common.
HLF 1153 20 April 2003.
Coll. N.T.Hiep, N.N.Thin, V.X.Phuong, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.