Uniaxial branch: the terminal bud is developed, and the main branch is obvious and strong. The lateral branches belong to the trunk. If the main continuous growth is greater than the lateral branch growth, cylindrical and tower-shaped crowns will be formed. Such as Populus davidiana, Populus Xinjiang, Populus diamond, Sabina vulgaris in Taiwan Province Province, Platycladus orientalis, Taxus columnar, etc. If the extension growth of the lateral branches is close to the height growth of the trunk, a conical crown is formed. Such as cedar, fir, spruce, etc.
Pseudo-dichotomy: the terminal bud at the branch end naturally dies or is inhibited, resulting in lateral branch advantage, and the trunk is not obvious, forming a network branch shape. If the height is slightly longer than the lateral length, the crown is oval, and it is round when it is near. Such as cloves, steamed bread willows, thousands of Chinese toons, sapporo umbrellas, frozen greens and so on. When the lateral growth is stronger than the high growth, it becomes oblate. Such as chestnut and green maple.
Axial branching: there is no terminal bud at the end of the branch, and the terminal bud is replaced by the highest lateral bud for continuous high growth. The trunk is still obvious, but most of it is curved. Because of the different opening angles of the lateral branches replacing the trunk, the more upright ones are close to the uniaxial crown and the more developed ones are close to the pseudo-binary crown. Therefore, the crown shape of nested tree species varies greatly, mostly umbrella-shaped or irregular, such as sword Suzuki, willow, persimmon and so on.
The angle and length of branches in the branching habit also affect the tree shape. Most tree species have upright and inclined branching angles, but some tree species have flat branches, such as Sabina vulgaris. Some branches are long, soft and drooping, such as weeping willows. Some branches stick to the ground and grow flat, such as creeping cypress. Trees and shrubs also have important ornamental characteristics and can be used as the main ornamental trees in winter gardens. Such as wine bottles, desiccated coconut such as wine bottles, Buddha's belly bamboo, Buddha's belly tree, such as Buddha's belly tree. White birch, white eucalyptus, pink willow, two-color swing, raspberry and other branches are all white. The branches of red rosewood, Salai, Qinghai-Tibet Rubus and Zizhu are red and purple. The branches of Daitang, Bamboo, Indus, Green Press, Populus cathayensis, Populus hopeiensis and Populus tomentosa are green or grayish green. Plum, plum, plum branches are square copper. Jinyu Bamboo, Jinyu Bamboo and Jinzhu are yellow. There are Pinus bungeana, Ulmus pumila, Elaeagnus maculata, Cinnamomum camphora, Litsea cubeba, Platanus acerifolia, Lithocarpus purpurea, Papaya and so on.