柴桦 chai hua

Shrubs to 3 m tall; bark grayish white. Branches dark purplish brown or gray-black, glabrous; branchlets brown, scabrous, with dense, resinous glands. Petiole 2-10 mm, glabrous; leaf blade ovate or ovate-elliptic, rarely broadly ovate, 1.5-3 (-4.5) × 1-2(-3.5) cm, abaxially densely resinous glandular, adaxially sparsely pubescent along veins, base subrounded or broadly cuneate, margin irregularly and simply minutely serrate, apex acute, rarely subrounded or obtuse; lateral veins 5-8 on each side of midvein. Female inflorescence erect or spreading, oblong or oblong-cylindric, 1-2 cm × 5-8 mm; peduncle 2-5(-10) mm, densely pubescent; bracts 4-7 mm, ciliate, 3-lobed, middle lobe oblong, lateral lobes spreading or suberect, oblong, ca. 1/2 as long as middle lobe. Nutlet elliptic, ca. 1.5 × 1 mm, with membranous wings 1/3-1/2 as wide as nutlet. Fl. Jun-Jul, fr. Jul-Aug.

Swamps in forests, streambanks; 600-1100 m. N Heilongjiang, Nei Mongol [Korea, Mongolia, Russia (E Siberia)]