Hoa Binh Prov., Tan Lac Distr., Bac Son Comm., Hay Duoi Vill., Phu (in EN-rock) Mt., around point 20034′24″N, 105007′45″E, 860 m a.s.l., limestone mt. In logged primary closed evergreen broad-leaved submontane forests, lower slopes Perennial herb, in open places
CPC 668 25 Oct 2010 Coll.: NQ Hieu, PK Loc, NT Vinh, NS Khang & BV Sinh