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Chinese Plant Names | Family List | Betulaceae | Betula

Betula dahurica Pall.


Description from Flora of China

Betula dahurica var. oblongifolia Liou; B. dahurica var. ovalifolia Liou; B. dahurica var. tiliifolia Liou; B. maackii Ruprecht; B. maximowiczii Ruprecht.

Trees to 20 m tall; bark black-brown, fissured. Branches red-brown or dark brown, shiny, glabrous; branchlets red-brown, villous, with dense, resinous glands. Petiole 0.5-1.5 cm; leaf blade ovate, broadly ovate, rhombic-ovate, or elliptic, 4-8 × 3.5-5 cm, abaxially densely resinous glandular along veins, bearded in axils of lateral veins, adaxially glabrous, base subrounded, broadly cuneate, or cuneate, margin irregularly and acutely doubly serrate, apex acute or acuminate; lateral veins 6-8 on each side of midvein. Female inflorescence erect or pendulous, oblong-cylindric, 2-2.5 × ca. 1 cm; peduncle 5-12 mm; bracts 5-6 mm, ciliate, 3-lobed, middle lobe oblong-lanceolate, lateral lobes spreading or recurved, ovate or broadly ovate, ca. as long as middle lobe. Nutlet broadly elliptic, glabrous, with membranous wings ca. 1/2 as wide as nutlet. Fl. Jun-Jul, fr. Jul-Aug. 2n = 56.

The wood is hard and dense, and is used in house construction and for making agricultural tools and furniture.

Mixed or coniferous forests, dry or moist, sunny slopes, rocks on mountain summits; 400-1300 m. Hebei, Heilongjiang, E Jilin, N Liaoning, Nei Mongol, Shaanxi, Shanxi [Japan, Korea, E Mongolia, Russia (Far East)]


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