oil root: scientific name: tassel! Produced in China, Gansu, Shaanxi, Shanxi, Hebei and as far south as Yunnan, Guangdong, Fujian, Taiwan Province and other provinces; Japan and the Korean peninsula are also distributed. The national second-class protected plants are deciduous small trees or shrubs. The plant height is 6-2m, and the bark is grayish brown and flaky. Branches spread out and branchlets are gray-green. Leaves opposite, ovate to obovate-elliptic, entire or serrate. Dioecious, cymose panicles with branches at the top, scattered, white corolla and short tube. Like light, but also more resistant to yin. Like warm climate, but also quite cold-resistant. Likes neutral and slightly acidic soil, and is resistant to drought, barrenness and waterlogging. Flowering period is April-May. Deciduous trees. Branchlets grayish yellow, densely villous. Leaves opposite, leathery, elliptic or obovate-elliptic, entire. Dioecious, compound cymes terminal, calyx 4-lobed, corolla 4-parted, lobes linear white. Flowering period is April-May. Drupe oval, blue and black. Fruiting period: September-October. The willow tree is tall and beautiful, with lush foliage. It is full of white flowers in early summer, such as frost and snow, which is beautiful and pleasant. It is suitable for planting around buildings, or beside Chi Pan and sidewalks in parks. You can also choose old piles for potted plants to make pile scenes. Young leaves can be used as drinks instead of tea. Fruit is rich in oil, which can be pressed for industrial use. The wood is heavy and meticulous, and can be used to make utensils. It is also a common rootstock for grafting osmanthus fragrans in the north.