FLORA OF VIETNAM Polypodiaceae s.l. Polypodium bourretii C. Chr. & Tardieu
N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Thanh Son Municipality, E macroslope of middle part of Pu Luong range around point 20°28′14′'N, 105°05′34′'E. Primary evergreen seasonal broad-leaved closed submontane forest on basalt at elev. 1200-1450 m. Lithophyte and epiphyte. Very common.