Northern Vietnam, Ninh Binh Prov., Nho Quan Distr., Cuc Phuong Municipality, Cuc Phuong National Park, about 3 km NW from Bong locality, 20°21′01′'N, 105°35′38′'E, old Dracontomelum. Primary closed evergreen seasonal broad-leaved lowland forest on slopes of limestone hills at elev. about 370 m a.s.l. Shrub 2-3 m hg on shady rocky slope. Flowers yellow. Rare.