Morphological characteristics:

 

Deciduous trees, up to 20 meters in height, and 80 cm in diameter at breast height. The big branches are slanting, the crown is wide and round; the bark is dark gray and black, cracked.

 

Ditch; branches are slender, erect or obliquely spreading, light brownish yellow or greenish, then brown, glabrous, young branches hairy. The buds are slightly pubescent. Leaves are lanceolate, 5-10 cm long, 1-1.5 cm wide, apex is long and acuminate, base is narrow and round or cuneate, top is green, glabrous, shiny, bottom is pale or whitish, with fine glands and serrated margin , Young leaves have filamentous pilose; petiole is short, 5-8 mm long, with long pilose on top; stipules are lanceolate or absent, with fine glandular serrations on the edge. The inflorescence and leaves open at the same time; the male inflorescence is cylindrical, 1.5-2.5 (-3) cm long, about 6-8 mm thick, somewhat peduncle, long hairs on the shaft; stamens 2, long hairs at the base of the filaments, and oval anthers , Yellow; bracts ovate, yellow-green, obtuse at apex, somewhat pubescent at base; gland 2; female inflorescence is shorter than male inflorescence, 2 cm long, 4 mm thick, with 3-5 leaflets born in short inflorescence The stalk has long hairs on the shaft; the ovary is oblong, subsessile, glabrous, without style or very short, stigma ovate, subcircularly cleft; bracts are the same as male flowers; glands 2, dorsal and abdomen. The fruit sequence is 2 (2.5) cm long. Flowering in April, fruiting period from April to May.

 

Growth habits:

 

It is light-loving, hardy, and can grow on wet and dry land, but it grows best on moist and well-drained soil; it has a well-developed root system, strong wind resistance, fast growth, and easy reproduction.

 

distribution range:

 

It grows in the Northeast, North China Plain, Northwest Loess Plateau, west to Gansu and Qinghai, south to the Huai River Basin and Zhejiang and Jiangsu. It is a common tree species in the plains. It is resistant to drought, wetness, and cold. The type specimens were collected from Lanzhou, Gansu, and are also distributed in North Korea, Japan, and the Far East of the Soviet Union.

 

Medicinal value:

 

Functions and indications: clearing away heat and dampness, reducing swelling and relieving pain. Indications of acute cystitis, poor urination, arthritis, yellow water sores, sores, toothache.