S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, Bach Ma mt, Hai Vong Dai peak, around point 16°11′65′'N 107°51′53′'E at elev. about 1150 m a.s.l.
Mixed and broad-leaved evergreen secondary closed mt forest on steep shale slopes. Terrestrial herb on shady steep slope. Flowers white, anthers yellow. Locally common.
HLF 1044 19 April 2003.
Coll. N.T.Hiep, N.N.Thin, V.X.Phuong, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.