2. Ginkgo biloba is a fast-growing and precious timber tree with yellowish sapwood, yellowish brown heartwood, fine structure, light and soft weight, elasticity, easy processing, luster, and specific gravity of .45-.48, which is not easy to crack and flex. It is an excellent wood and can be used for buildings, furniture, interior decoration, carving, drawing boards, etc. Seeds are used for food (easy to be poisoned by eating too much) and medicine. Leaves can be used as medicine, insecticide and fertilizer. The fleshy testa of seeds contains ginkgolic acid, ginkgol and ginkgol, which is toxic. Bark contains tannin. Ginkgo tree has a beautiful shape, leaves are light green in spring and summer, and turn yellow in autumn, which is quite beautiful and can be used as garden trees and street trees.