S.Vietnam, Thua Thien Hue Prov., Xuan Loc Distr., Bach Ma National Park, steep S slopes along Dong Truoi ridge around point 16°14′11′'N 107°44′28′'E at elev. 600-800 m a.s.l.
Broad-leaved evergreen primary closed wet forest along steep rocky slopes and cliffs of shady stream canyon. Lithophytic herb on wet open stream rocks. Flowers white. Very common.
HLF 1642 8 May 2003.
Coll. N.T.Hiep, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.