FLORA OF VIETNAM Zingiberaceae Zingiber monophyllum Gagnep. N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Co Lung Municipality, Eo Dieu village, around point 20°25′35′'N, 105°14′46′'E. Primary evergreen seasonal broad-leaved closed lowland forest on crystalline marble-like highly eroded limestone, very steep rocky mt slopes at elev. 400-500 m. Terrestrial herb in shady places. Very common.