1. Pines are mostly tall trees, with a height of 20-50 meters and a maximum height of 75 meters. Very few are shrub-like, such as slash pine and slash pine. Pine trees are wheel-shaped branches with long internodes, thin and flat branchlets or slightly bent downward, and slender needles in bundles. Its crown looks loose but not compact, and the word "loose" is an image description of its crown characteristics. So "pine" is a tree with a loose crown. Pine trees are strong and have a long life.

2. Willow is the general name of a kind of plants: Salix matsudana, Salix psammophila, Salix weeping willow and Pterocarya stenoptera. There are many kinds of willows, which are easy to cross. Hybrid has strong growth potential and adaptability, and it is easy to reproduce asexually. You can choose from natural or artificial hybrid populations and obtain excellent clonal varieties through asexual propagation. In addition, a large number of high-quality seedlings can be obtained quickly by plant tissue culture. Breeding based on garden ornamental should focus on improving its branches, leaves and tree shape, and improving its anti-pollution ability and pruning and shaping ability.

3. Cinnamomum camphora, alias: Cinnamomum camphora, Cinnamomum camphora, Yaorenchai, Cinnamomum camphora, Cinnamomum camphora, Cinnamomum camphora, Cinnamomum camphora, Cinnamomum camphora. Cinnamomum camphora is an evergreen tree, with a height of 30 meters and a diameter of 3 meters, and a wide oval crown; Broad crown, dense branches and leaves, magnificent, is an excellent green tree, street tree and courtyard shade tree.