FLORA OF VIETNAM Polypodiaceae s.l. Polystichum sp.
N. Vietnam, Hoa Binh prov., Mai Chau distr., Hang Kia municipality, near Pa Khong village, (20°44′40′'N, 104°52′32′'E). Primary broad-leaved evergreen dry forest with Pinus kwangtungensis along tops of highly eroded remnant karst limestone ridge at elev. 1300-1440 m a.s.l. Terrestrial fern on very steep shady slope. Not common.