Weeping willow, Latin name: Salix babylonica, alias: hanging branch willow, inverted hanging willow, and inverted inserted poplar willow, is a deciduous tree of the Salicaceae family and genus Salix. It can reach up to 18 meters in height with a diameter at breast height of 1 meter, and its crown is inverted broad ovate. It is distributed in the plain areas of provinces south of the Yangtze River basin, and is cultivated in North China and Northeast China. The vertical distribution is below an altitude of 1300 meters, and it is a common tree species near water on plains. Many countries in Asia, Europe, and America have a long history of cultivation.
The tree can grow up to 18 meters high; the crown is inverted broad ovate. The branches are slender and drooping. The leaves are narrowly lanceolate to linear-lanceolate, measuring 8~16 cm in length, with a gradually tapering apex, finely serrated margins, green on the surface, and bluish-green on the back; the petiole is about 1 cm long; the stipules are expanded falcate, falling early. Male flowers have 2 stamens and 2 glands; female flowers have only one gland on the ventral side of the ovary. The flowering period is from March to April, and the fruit ripening period is from April to May.