Quang Binh Prov., Minh Hoa Distr., Thuong Hoa municipality, environs of Mo O O O village, around point 17°39’21.1”N 105°54’41.7”E. Remnants of short tall broad-leaved primary forest on rocky top of remnant mountain composed with highly eroded solid crystalline limestone at elevation about 570 m a.s.l. Shrub 3-4 m tall on rocky mountain top. Very common. Co-dominant of short tall mountain top forest.