FLORA OF VIETNAM Gesneriaceae Rhynchotechum latifolium Hook.
N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Thanh Son Municipality, Bang village, E macroslope of Pu Luong range around point 20°27′34′'N, 105°07′17′'E at elev. 700 m a.s.l. Secondary evergreen shrubs at edge of forest on shale soil. Undershrub 1 m tall. Rare.