Quang Nam Prov., Nam Giang Distr., near Thanh My town, around point 15°49’08”N 107°44’17”E. Secondary broadleaved evergreen forest along steep rocky stream slopes composed with shale at elev. about 150 m a.s.l. Scandent shrub with shoot to 5 m long on open, very steep river slope. Flowers white. Common.