FLORA OF VIETNAM Polypodiaceae Polystichum biaristatum (Blume) T. Moore
N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Thanh Son Municipality, middle part of Pu Luong range, SE slopes of Phu Pha Phong peak around point 20°28′37′'N, 105°05′20′'E along main ridge. Primary evergreen seasonal broad-leaved closed submontane forest on basalt at elev. 1600-1650 m. Terrestrial and lithophyte. Very common.