﻿AbstractLithocarpusdahuensis, a newFagaceaespecies from Fujian Province, China, is described and illustrated. The new species is morphologically similar toL.konishii, but its oblanceolate leaf blade has more pairs of acute teeth on the margin, denser lateral veins, smaller cupules enclosing up to 1/4–1/3 of the nut, and its nut is only half as long as those ofL.konishii. The plastome ofL.dahuensiswas 161,303 bp in length and displayed the typical quadripartite structure. Phylogenetic analyses distinguishedL.dahuensisfromL.konishiiwith strong support based on whole plastome and nrITS, respectively.