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.
Woody vine 3-5 m long. Flowers light green, filaments and anthers light yellow. Abundant.
HLF 1322 25 April 2003. (Photo).
Coll. L.Averyanov, N.T.Vinh. Grant from Henry Luce Foundation.