Vietnam, Thua Thien – Hue Prov., Huong Thuy Distr., Duong Hoa Municipality, Huong Thuy forest enterprise territory, around point 16°12′50′'N, 107°36′29′'E, mountain and hill slopes composed with shale at elevation about 200 m a.s.l.
Fractionally logged primary and secondary closed evergreen broad-leaved forest on steep stream slopes.
Shrub 2-4 m tall along rocky stream valley. Flowers light greenish. Occasional.