Carpinus hogoensis Hayata; C. sekii Yamamoto.

Trees; bark dark gray. Branchlets brown, glabrous or sparsely pubescent. Petiole 0.8-1.5 cm, sparsely pubescent; leaf blade ovate-lanceolate or oblong-lanceolate, 4-5 × 1.8-2.5 cm, abaxially sparsely villous along veins, adaxially sparsely pubescent when young, glabrescent, base subrounded or subcordate, sometimes unequal, margin regularly and doubly serrate, sometimes simply serrate distally, apex acuminate or caudate-acuminate; lateral veins 10-15 on each side of midvein. Female inflorescence 4-6 × 2-2.5 cm; peduncle ca. 1 cm, densely pubescent; bracts semiovate, 1.8-2 cm, densely pubescent adaxially, outer margin irregularly coarsely dentate, without basal lobe, inner margin subfalcate or straight, entire, with ovate, inflexed basal lobe ca. 3 mm, apex acuminate; veins 5, reticulate veins prominent. Nutlet broadly ovoid, ca. 3 mm, sparsely resinous glandular, densely villous at apex, 6-ribbed. Fl. May-Jun, fr. Jul-Aug.

* Sunny places within subtropical forests; 500-2000 m. Fujian (Liancheng Xian), Taiwan (Alishan)