S.Vietnam, Thua Thien Hue Prov., Xuan Loc Distr., Bach Ma National Park, along Dong Truoi ridge and S slopes around point 16°14′11′'N 107°44′28′'E.
Broad-leaved evergreen primary closed forest on very steep slope at elev. 700-800 m a.s.l. Terrestrial and lithophytic herb on steep shady rocky slope in wet place along stream slope. Leaves uniform green with purple hairs, petioles and stem green to reddish-brown. Locally abundant.
HLF 1719 7 May 2003.
Coll. N.T.Hiep, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.