FLORA OF VIETNAM Polypodiaceae s.l. Polystichum sp.
N. Vietnam, Hoa Binh prov., Mai Chau distr., Hang Kia municipality, near Hang Kia village (20°43′39′'N, 104°53′43′'E). Primary broad-leaved evergreen wet forest on slopes of remnant limestone highly eroded ridge at elev. 1100-1300 m a.s.l. Lithophytic fern on very steep rocky slope. Very common.