Lai Chau Prov., Sin Ho Distr., Phin Ho Mun., Ta Genh vill., around point 22?28′32′' N, 103?17′25′' E, 990 m. Slopes of non-limestone mountains.
Woody evergreen big vine, up to more than 20 m long. Occasionally common. HAL 8834 13 Jun 2006 Collectors: P.K. Loc, N.T. Vinh, N.S. Khang, P.N. Quan and L.H. Phong.
Collected with the financial support from the Program of Basic Researchs in Life Sciences, Vietnam.