FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Scrophulariaceae Paulownia sp.
Vietnam, Quang Binh Prov., Bo Trach Distr., Tan Trach Municipality, about 0.5 km to E of A Rem village (17°23′32′'N, 106°12′46′'E).
Primary closed broad-leaved forest on steep slopes of rocky ridge composed with solid marble-like highly eroded solid crystalline limestone at elevation about 750 m a.s.l.
Tree 20-25 m tall. Flowers dirty light violet. Rare.