Vietnam, Thua Thien – Hue Prov., Huong Thuy Distr., Duong Hoa Municipality, Huong Thuy forest enterprise territory, around point 16°13′36′'N, 107°35′09′'E, SW slopes of Mang Chan ridge at elevation about 450-500 m a.s.l.
Fractionally logged primary closed evergreen broad-leaved forest along steep stream slopes composed with shale with quartzite.
Terrestrial herb on very steep shady slope. Locally common.