Corylus rostrata Aiton var. mandshurica (Maximowicz) Regel; C. sieboldiana Blume var. mandshurica (Maximowicz) C. K. Schneider.

Shrubs to 6 m tall; bark gray-brown, fissured. Branchlets pubescent, villous, stipitate glandular, glabrescent. Petiole 1-3 cm, slender, pubescent, villous, stipitate glandular; leaf blade broadly ovate, oblong, or oblong-obovate, 6-12 × 4-9 cm, abaxially pilose especially along veins, adaxially pilose or glabrous, base cordate, margin irregularly and coarsely serrate, lobed above middle, apex mucronate-acuminate or caudate; lateral veins 9 or 10 on each side of midvein. Male inflorescences 2-4 in a cluster; peduncle short; bracts ovate-triangular, densely pubescent. Female flowers 2-4 in a cluster; bracts

forming a tubular sheath, 3-6 cm, densely yellow setose, white pubescent, and stipitate glandular, much constricted above nut and divided into lanceolate lobes at apex. Nut enclosed by bracts, ovoid-globose, ca. 1.5 cm in diam., white pubescent. Fl. May-Jul, fr. Jul-Sep.

The nuts are edible.

Temperate forests, thickets; 400-2600 m. E Gansu, Hebei, Heilongjiang (Daxinganling), Henan (Funiu Shan), ?Hubei, Jilin (Changbai Shan), Liaoning, Nei Mongol, Shaanxi, Sichuan [Japan, Korea, Russia (Far East)].