Da Nang City, Hoa Vang Distr., Hoa Ninh municipality, Ba Na – Nui Chua protected area, around point 16°00′05”N 108°01′15”E. Highly destroyed primary and secondary broadleaved evergreen forest on very steep mountain slopes with granite mother rocks at elev. 800-900 m a.s.l. Woody vine about 10 m long on steep shady slope. Flowers dull purple-brownish. Not common. CPC 3307 16 May 2011