FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Begoniaceae Begonia vietnamensis Aver., sp.nov.
Vietnam, Quang Binh Prov., Minh Hoa Distr., Thuong Hoa Municipality, around Ban On village (17°40′21′'N, 105°58′00′'E).
Primary closed evergreen broad-leaved lowland forest on steep slopes of rocky ridge composed with solid marble-like highly eroded stratified crystalline limestone at elevation about 400 m a.s.l.
Lithophytic herb on shady wet vertical cliff. Flowers light pink. Very common.