Vietnam, Thua Thien – Hue Prov., A Luoi Distr., Huong Nguyen Municipality, in vicinities of Tra Ve forest protection station, around point 16°15′27′'N, 107°26′15′'E at elevation about 80-100 m a.s.l.
Secondary closed evergreen broad-leaved forest on steep hill and mountain slopes composed with shale along stream valley.
Creeping herb on very steep slopes along rocky stream valley. Flowers pink-violet. Occasional.