Celtis koraiensis Nakai

Trees, to 15 m tall, deciduous. Bark gray. Branchlets brown, glabrous or with a few hairs near nodes, with scattered small elliptic lenticels. Winter buds brown, 2-4 mm; inner scales brown pubescent. Petiole brown, 0.5-1.5 cm, adaxially with a narrow and sharply defined furrow, glabrous or sparsely pubescent; leaf blade elliptic, obovate-elliptic, or rarely broadly obovate, 7-12 × 3.5-10 cm, papery, glabrous or abaxially sparsely pubescent but sometimes only on veins and vein axils, base broadly cuneate, ± rounded, or ± cordate and slightly oblique, margin deeply laciniate-toothed, teeth 15-24 on each side and 4-8 mm, apex truncate with a caudate tip; secondary veins 3 or 4 on each side of midvein. Flowers solitary or fascicled. Style branches linear, undivided. Infructescence stout, solitary, glabrous or sparsely pubescent, 1.5-2.5 cm, 2-2.5 × as long as subtending petiole. Drupe 1 per infructescence, orangish yellow, dark brown when mature, ± globose to ellipsoid, 1-1.3 cm, basally and apically obtuse. Stone grayish brown, ovoid-elliptic, ca. 8 mm in diam., reticulately foveolate, 4-ribbed. Fl. Apr-May, fr. Sep-Oct.

N Anhui, E Gansu, Hebei, W Henan, Jiangsu, S Liaoning, S Shaanxi, Shandong, S Shanxi [Korea].

Forests, valleys, slopes; 100-1500 m.

Celtis aurantiaca Nakai; C. koraiensis var. aurantiaca (Nakai) Kitagawa.

Celtis koraiensis, commonly known as the Korean hackberry is a deciduous tree in the genus Celtis. The species is endemic to the Korean Peninsula and the north of China. It is typically found in altitudes of 100 to 1,500 metres (330 to 4,920 ft).

The tree flowers from April to May, and the fruit ripens from September to October. It can grow up to 15 metres (49 ft) in height.