FLORA OF VIETNAM Fagaceae Castanopsis tonkinensis Seem.
Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, to the S of Na Nheo village (in the vicinity of point 21°59′04′'N, 104°15′08′'E). Primary closed broad-leaved evergreen submontane forest on steep granite and quartzite slopes at elev. 1000- 1100 m a.s.l. Tree about 30 m hg. Common. Usual co-dominant of first forest stratum.