Lai Chau Prov., Phong Tho Distr., Sin Suoi Ho Municipality, Sa Ma Pho village, around point 22°32′20″N 103°33′31″E.
Secondary open evergreen broad-leaved forest and secondary woodlands on very steep mountain slopes and cliffs composed predominantly with weathered granite at elev. about 1700-1900 m a.s.l.
Herbaceous vine 2-3 m long on open rocky grassy steep slope. Flowers yellow. Not common.
HAL 10660 12 Dec. 2006 Photo. Coll.: Nguyen Tien Hiep, L.Averyanov, Phan Ke Loc, Pham Van The, N.T.Vinh.