狭翅桦 xia chi hua

Betula chinensis Maximowicz var. fargesii (Franchet) P. C. Li.

Trees to 15 m tall; bark dark gray. Branchlets brown, sparsely pubescent. Petiole 4-6 mm, pubescent; leaf blade ovate or ovate-lanceolate, 4.5-6 × 2.5-4.5 cm, papery, abaxially villous along veins, adaxially scattered pilose, base rounded, margin irregularly and doubly mucronate serrate, apex acute or acuminate; veins 9-11 on each side of midvein. Female inflorescence ovoid or ovoid-oblong, 1-1.5 × 0.5-1.5 cm; peduncle 1-2 mm; bracts 5-10 mm, ciliate, with 3 subequal lobes. Nutlet obovate, pubescent, with very narrow wings. Fl. May-Jun, fr. Jul-Aug.

* Broad-leaved forests or thickets on hilltops; 1500-2600 m. W Hubei, E Sichuan (Chengkou Xian)