FLORA OF VIETNAM Hymenophyllaceae Hymenophyllum khasianum Baker
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. Epiphyte and lithophyte. Abundant.