N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Hong Municipality, around point 18°34′06′'N, 105°11′40′'E. Logged primary broad-leaved evergreen forest on steep mt slopes composed with shale at elev about 350-450 m a.s.l. along Khe Sinh stream canyon.
Ascending woody vine up to 3 m tall. Fruits dull green. Occasional.