Hoa Binh Prov., Mai Chau Distr., Pa Co Municipality, Xa Linh village, Rung gia (Old forests) locality, around point 20?44′26″ N, 104?56′19″ E, 990 m a.s.l.
Edge of closed evergreen broad-leaved submontane forests on slopes of limestone mountain.
Herbaceous vine, 5-7 m long.
HAL 8908 20 Jul 2006 Photos Id. by Nguyen Huu Hien Collectors: Phan Ke Loc, Le Dong Tan, Nguyen Sinh Khang & Nguyen Tien Vinh
Collected with the financial support from NYBG, U.S.A.