Carpinus rankanensis Hayata

Trees; bark dark gray. Branchlets brown, glabrous. Petiole 5-10 mm, glabrous; leaf blade oblong, ovate-oblong, or elliptic, 8-10 × 3-4 cm, abaxially villous along midvein and lateral veins, adaxially glabrous except hirtellous along midvein, base cordate, margin irregularly and doubly setiform serrate, apex acuminate or caudate-acuminate; lateral veins 20-25 on each side of midvein. Female inflorescence terminal, 10-12 cm; peduncle 2-3 mm, hirtellous; bracts densely overlapping, ovate-oblong or lanceolate, ca. 13 × 7 mm, abaxially bearded at base, outer margin remotely serrate and inflexed, without basal lobe, inner margin entire or remotely serrate distally, with small, inflexed basal lobe covering nutlet, apex acute or acuminate; veins 3 from base, reticulate veins faint. Nutlet oblong or ovoid, ca. 3.5 mm, with very faint ribs. Fl. May-Jun, fr. Jul-Aug.

Taiwan.

* Mixed forests; 1000-2000 m.