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 and lithophytic herb in shady wet place along stream. Flowers white, anthers yellow. Not rare.
HLF 1448 29 April 2003.
Coll. N.T.Hiep, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.