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 1370 m a.s.l.
Mixed and broad-leaved evergreen primary closed mt forest on steep shale slopes. Terrestrial herb in open place, flowers white with blue. Occasional.
HLF 1011 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.