FLORA OF VIETNAM Rubiaceae Paederia scandens (Lour.) Merr.
N.Vietnam, Thanh Hoa Prov., Quan Hoa Distr., Phu Le Municipality, Hang village, around point 20°31′13′'N, 105°05′45′'E. Primary evergreen seasonal broad-leaved closed lowland forest on very steep slopes and cliffs of rocky ridge composed with crystalline marble-like highly eroded limestone at elev. 450-650 m. Herb vine 10-15 m lg in open slope. Flowers dirty light violet with purple inside tube. Very common.