FLORA OF VIETNAM Begoniaceae Begonia nahangensis Aver. Type
N. Vietnam, Tuyen Quang prov., Na Hang distr., Xuan Tam municipality, near Ban Cai village (22°29′18′'N, 105°19′47′'E). Primary broad-leaved evergreen dry forest on very steep slopes of highly eroded remnant limestone ridge at elev. 450-500 m a.s.l. Lithophytic herb adpressed in crevices of vertical shady cliffs. Leaves deep green with light green irregular palmate oriented spots above, light green with dirty purple-violet spots below. Flowers light yellowish-green. Abundant at elev. 400 m a.s.l.