S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, N slope of Bach Ma mt system, to the N of point 16°12′11′'N 107°50′23′'E at elev. about 400 m a.s.l.
Broad-leaved evergreen primary closed wet mt forest along deep rocky stream canyon. Terrestrial herb on open steep slope. Flowers white. Not rare.
HLF 1442 29 April 2003.
Coll. N.T.Hiep, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.