Hoa Binh Prov., Tan Lac Distr., Ngo Luong Municipality, Tram Hai Village, ca. 500 m to S of coordinate 20°27′55”N 105°17′01”E.
Edges of heavily logged evergreen broad-leaved forest on slope of limestone mts., at elevation about 730 m a.s.l. Perennial herb, 0.5 m tall. Flowers white. Rather common.