Hoa Binh Prov., Tan Lac Distr., Nam Son Comm., Xom Vill., near Dinh Cot Moc Mt., around point 20033′37″N, 105008′38″E, 1030 m a.s.l., limestone mt. In logged primary closed evergreen broad-leaved submontane forests on slopes Lithophyte; flowers CPC 713 27 Oct 2010 Coll.: NT Vinh, PK Loc, NT Vinh, NS Khang & BV Ha Grant from