Hoa Binh Prov., Tan Lac Distr., Bac Son Comm., Hay Duoi Vill., Dac Lut Mt., around point 20034′11″ N, 105007′08″E, 980 m a.s.l., limestone mt. In open places of logged primary closed evergreen broad-leaved submontane forests, ridges Undershrub, 1-2 m tall. CPC 645 24 Oct 2010 Coll.: NQ Hieu, PK Loc, NT Vinh, NS Khang & BV Sinh