Vietnam, Thua Thien – Hue Prov., A Luoi Distr., Hong Kim Municipality, Dut village, about 3 km to NE from point 16°19′05″N, 107°12′42″Enear A Nor waterfall at elevation about 1000 m a.s.l.
Secondary closed broad-leaved forest along mountain ridge composed with shale and granite.
Terrestrial herb up to 2 m tall in open sandy place along stream. Flowers light violet. Not common.