FLORA OF VIETNAM Cyperaceae Carex aff. perakensis C.B. Clarke
N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Thanh Son Municipality, middle part of Pu Luong range, rocky cliffs of Phu Pha Phong peak around point 20°28′37′'N, 105°05′20′'E. Primary evergreen seasonal broad-leaved closed submontane forest on basalt at elev. 1600-1650 m. Terrestrial sedge up to 0.7 m tall. Very common.