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. Small herb on open wet slope along stream. Flowers pink-purple. Locally common.
HLF 1040 19 April 2003. (Photo)
Coll. N.T.Hiep, N.N.Thin, V.X.Phuong, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.