Vietnam, Thua Thien – Hue Prov., Nam Dong Distr., Huong Son Municipality, around point 16°09′52′'N, 107°36′22′'E (around plot 16°09′36′'N, 107°36′10′'E).
Heavily logged primary closed broad-leaved evergreen lowland forest along La Ma River on very steep hill slopes composed with clayey shale at elevation about 300-450 m a.s.l.
Woody vine with 2-4 m long on shady rocky stream slope. Stem with milky juice. Common.
HAL 6967 26 March 2005.
Collectors: L.Averyanov, N.T.Hiep, P.K.Loc, P.V.The, A.Averyanova, N.T.Vinh. Were also observed fruits without numbers: Quercus sp. Passifloraceae sp. Cryptocarya sp. Sapotaceae sp. Canarium sp. (dominant of 1 forast stratum)