Vietnam, Thua Thien – Hue Prov., A Luoi Distr., Hong Van Municipality, Ta Lo village, around point 16°21′52′'N, 107°09′36′'E at elevation about 700-750 m a.s.l.
Secondary open broad-leaved forest and shrubs on steep mountain slopes composed with shale and granite.
Woody vine 5-6 m long. Flower buds whitish. Occasional.