Vasilis Teodoridis:
Betulaceae | Betula
17. Betula utilis D. Don; Prodr. Fl. Nepal. 58. 1825.
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Betula albosinensis Burkill var. septentrionalis C. K. Schneider; B. bhojpattra Lindley in Wallich; B. bhojpattra var. latifolia Regel; B. utilis var. prattii Burkill.
Trees to 35 m tall; bark dark red-brown; exfoliating in thin flakes. Branches red-brown; glabrous; branchlets brown; densely resinous glandular and pubescent. Petiole 0.8-2 cm; leaf blade ovate; ovate-elliptic; or oblong; 4-9 x 2.5-6 cm; abaxially densely resinous punctate and pubescent; bearded in axils of lateral veins; adaxially densely villous when young; base rounded or subcordate; margin irregularly and doubly mucronate serrate; apex acuminate or caudate-acuminate; lateral veins 8-14 on each side of midvein. Female inflorescence 1; or 2 or 3 in a raceme; pendulous; oblong-cylindric; 3-5 cm x 7-12 mm; peduncle 0.5-1.5 cm; bracts 5-8 mm; pubescent; ciliate; 3-lobed; middle lobe lanceolate; lateral lobes ovate; ca. 1/3 as long as middle lobe. Nutlet obovate; 2-3 x 1.5-2 mm; with membranous wings ca. as wide as nutlet. Fl. Jun-Jul; fr. Jul-Aug. 2n = 56.
Temperate broad-leaved forests; 2500-3800 m. Gansu; Hebei; Ningxia; Qinghai; Shaanxi; W Sichuan; E and S Xizang; NW Yunnan [Afghanistan; Bhutan; India; Nepal]