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′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/granite slopes and cliffs. Terrestrial herb on wet steep shady slope. Flowers light pink, anthers yellow. Occasional.
HLF 1158 20 April 2003.
Coll. L.Averyanov, N.T. Vinh. Grant from Henry Luce Foundation.