Hoa Binh Prov., Lac Son Distr., Ngoc Son Municipality, Khu village, around point 20?27′52″ N, 105?18′18″ E, 620 m a.s.l.
In open places of heavily logged primary and secondary closed evergreen broad-leaved lowland forests on foot of limestone mountains. Rather common. Small woody vine, up to 5-8 m long. Flowers pinkish. HAL 9010 27 Jul 2006 Photos Id: by Nguyen Huu Hien Collectors: Phan Ke Loc, Nguyen Sinh Khang & Nguyen Tien Vinh
Collected with the financial support from NYBG, U.S.A.