FLORA OF VIETNAM Apocynaceae Wrightia pubescens R.Br. subsp. lanitii (Blanco) Ngan
Northern Vietnam, Ha Tinh Prov., Huong Son Distr., Son Kim Municipality, in the vicinity of Rao An village, around point 18°24′30′'N, 105°13′13′'E. Remnants of primary evergreen lowland seasonal broad-leaved forest on very steep granite/shale slopes of rocky river canyon at 180-200 m a.s.l. Shrub 1.5-2 (up to 5) m hg in open slope. Flowers light yellowish. Not common.