FLORA OF VIETNAM Polygalaceae Polygala tonkinensis Chodat
Vietnam, Thua Thien – Hue Prov., Huong Thuy Distr., Duong Hoa Municipality, Huong Thuy forest enterprise territory, around point 16°13′25′'N, 107°34′09′'E, rocky quartzite outcrops along Mang Chan ridge at elevation about 825 m a.s.l.
Fractionally logged primary closed evergreen broad-leaved forest along ridge tops composed with white eroded quartzite.
Undershrub 1-1.5 m tall in open place. Flowers yeloow-orange, tepals with purple tips. Not common.