N. Vietnam, Bac Can prov., Ba Be distr., Nam Mau municipality, near Hua Tang village, Ba Be national park (22°27′10′'N, 105°34′29′'E). Remnants of primary dry broad-leaved evergreen forest along river near Ba Be lake at elev. 200-250 m a.s.l. Terrestrial fern. Tree about 15 m hg. Male flowers light yellowish-green. Common.