Betula microphylla Bunge

Trees to 6 m tall; bark grayish white, exfoliating in flakes. Branches grayish or grayish brown, resinous glandular; branchlets yellow-brown, densely pubescent and resinous glandular. Petiole slender, ca. 1 cm, densely pubescent; leaf blade rhombic or rhombic-obovate, 1.5-5 × 1-3.5 cm, both surfaces sparsely pubescent and resinous punctate when young, base cuneate, rarely broadly cuneate, margin irregularly and doubly or simply roughly serrate, apex acute or obtuse; lateral veins 4-6 on each side of midvein. Female inflorescence oblong-cylindric, 1-2.5 cm × 7-8 mm; peduncle erect, 5-10 mm; bracts 5-6 mm, sparsely pubescent and ciliate, 3-lobed, middle lobe oblong, lateral lobes erect or slightly spreading, ovate or oblong, ca. 1/2 as long as middle lobe. Nutlet ovate, ca. 2.5 × 1.5 mm, densely pubescent, with membranous wings ca. as wide as nutlet. Fl. Jun-Jul, fr. Jul-Aug.

Xinjiang (Altay Shan, Hami Xian) [Kazakhstan, Mongolia]

Temperate broad-leaved forests; 1200-1600 m.

Betula fruticosa Pallas var. cuneifolia Regel.

Betula halophila is a species of plant in the Betulaceae family. It is endemic to China.

Betula halophila is a tetraploid, placed in section Betula, subgenus Betula. There are no clear morphological boundaries between it and another three tetraploid species, B. tianshanica, B. microphylla, and B. ovalifolia, or the diploid B. humilis. All grow in open wetlands.