Thua Thien – Hue Prov., Nam Dong Distr., Thuong Lo Municipality, along Cha Mang stream, around point 16°07′46″N 107°44′24″E.
Remnants of primary evergreen broad-leaved lowland forest on very steep hill slopes along river valley composed with stratified shale and sandstone at elev. about 100-150 m a.s.l.
Terrestrial herb on very steep rocky wet open slope. Flowers white. Very common.
HAL 10968 7 Apr. 2007. Coll.: L.Averyanov, Phan Ke Loc, A.Averyanova, N.D.Phuong, L.V.Hung.