N. Vietnam, Hoa Binh prov., Mai Chau distr., Hang Kia municipality, near Hang Kia village (20°43′39′'N, 104°53′43′'E). Primary broad-leaved evergreen wet forest on remnant limestone highly eroded ridge at elev. 1100-1300 m a.s.l. Tree 5-7 m hg on tops of ridge. Flowers light greenish, young leaves pink-brown. Very common, usual codominante on tops of ridge and in middle part of mountain slopes.