S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, dry open secondary shrubs on granite cliffs along river in laterite hilly area near national park headqoarter around point 16°14′47′'N 107°52′31′'E at elev. about 40 m a.s.l.
Terrestrial and lithophytic herb on open steep slopes and cliffs. Common.
HLF 1323 25 April 2003.
Coll. L.Averyanov, N.T.Vinh. Grant from Henry Luce Foundation.