S.Vietnam, Thua Thien Hue Prov., Xuan Loc Distr., Bach Ma National Park, steep N slopes of Dong Truoi ridge around point 16°14′11′'N 107°44′28′'E at elev. 300 m a.s.l.
Broad-leaved evergreen secondary closed forest. Terrestrial herb up to 5 m tall on wet shady slope. Flowers bright red. Common.
HLF 1817 9 May 2003. (Photo).
Coll. N.T.Hiep, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.