Carpinus monbeigiana Hand.-Mazz.

Trees to 16 m tall; bark gray. Branchlets dark gray-brown, densely pubescent when young, glabrescent. Petiole ca. 1 cm, densely yellow pubescent; leaf blade oblong-lanceolate, ovate-lanceolate, or elliptic-lanceolate, rarely elliptic, 5-10 × 2.5-4 cm, abaxially sericeous-villous along veins, glabrous elsewhere, bearded in axils of lateral veins, adaxially densely villous along midvein, base rounded, subcordate, or rounded-cuneate, margin irregularly and doubly setiform mucronate serrate, apex acute, acuminate, or caudate-acuminate; lateral veins 14-18 on each side of midvein. Female inflorescence 5-8 × 2-2.5 cm; peduncle 1.5-2 cm, densely yellow hirsute; bracts semiovate, 1.6-2 cm × 6-8 mm, abaxially densely yellow hirsute along reticulate veins, outer margin coarsely dentate, without basal lobe, inner margin entire, with inflexed basal auricle, apex acute or obtuse; veins 5. Nutlet broadly ovoid, 3-4 mm, sparsely pubescent, villous at apex, densely brown or orange resinous glandular, prominently ribbed. Fl. May-Jun, fr. Jul-Aug.

Xizang, C and NW Yunnan

* Subtropical broad-leaved forests on mountain slopes, sometimes on limestone; 1700-2800 m.

Carpinus likiangensis Hu; C. monbeigiana Handel-Mazzetti var. weisiensis Hu.

Flowering from May to June; fruiting from July to August.

Carpinus monbeigiana is occurring in Xizang, C and NW Yunnan of China.

Phylogenetic studies were conducted for Carpinus and the subfamily Coryloideae (Betulaceae) using sequences of the chloroplast matK gene, the trnL-trnF region (trnL intron, and trnL [UAA] 3' exon-trnF [GAA] intergenic spacer) and the psbA-trnH intergenic spacer, and the nuclear ribosomal ITS regions. The combined analyses of the three chloroplast regions suggest that Coryloideae is monophyletic; within Carpinus, species of sect. Carpinus from eastern Asia form a monophyletic group (Yoo and Wen, 2007).

Trees to 16 m tall; bark gray. Branchlets dark gray-brown, densely pubescent when young, glabrescent. Petiole ca. 1 cm, densely yellow pubescent; leaf blade oblong-lanceolate, ovate-lanceolate, or elliptic-lanceolate, rarely elliptic, 5-10 cm long, 2.5-4 cm wide, abaxially sericeous-villous along veins, glabrous elsewhere, bearded in axils of lateral veins, adaxially densely villous along midvein, base rounded, subcordate, or rounded-cuneate, margin irregularly and doubly setiform mucronate serrate, apex acute, acuminate, or caudate-acuminate; lateral veins 14-18 on each side of midvein. Female inflorescence 5-8 cm long, 2-2.5 cm wide; peduncle 1.5-2 cm, densely yellow hirsute; bracts semiovate, 1.6-2 cm long, 6-8 mm broad, abaxially densely yellow hirsute along reticulate veins, outer margin coarsely dentate, without basal lobe, inner margin entire, with inflexed basal auricle, apex acute or obtuse; veins 5. Nutlet broadly ovoid, 3-4 mm, sparsely pubescent, villous at apex, densely brown or orange resinous glandular, prominently ribbed.

Growing in subtropical broad-leaved forests on mountain slopes; 1700-2800 m.