Dien Bien Prov., Tua Chua Distr., Xa Nhe Municipality, around point 21°52′35”N 103°24′21”E.
Highly degraded primary evergreen broadleaved dry forest on very steep slopes and on tops of remnant mountains composed with solid limestone at elevation 850-1050 m a.s.l.
Herbaceous vine 1-2 m long on very steep rocky rather open slope. Flowers yellowish. Common.
CPC 2227 11 April 2011 Coll.: L.Averyanov, P.K.Loc, N.Q.Hieu, N.T.Vinh.