S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, Bach Ma mt, about 6 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. Treelet about 6 m tall. Flowers brown-purple, tops of petals dull yellow. Tree about 4-5 m tall on steep shady slope. Rare.
HLF 1143 20 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.