Shrub refers to plants with a height less than 3.5 meters, which are usually clustered and have no obvious trunk. There are also a few plants with obvious trunks, such as peony, hydrangea and hemp leaves. If the stem is less than 0.5 meters, it is called a small shrub. The stem is between wood and grass, the upper part is grass and the lower part is wood, which is called semi-shrub or semi-shrub.

Second, the common types

1. Gardenia: Gardenia has many branches and leaves with oval leaves, and its flowering period is from May to July. The main varieties are gardenia, gardenia and gardenia. 2. Hypericum perforatum: the leaves are oval, light green, turn red after autumn, bloom in summer, and the flowers are golden yellow. 3. Smile: A smile is better than a smiling plum. This kind of white with purple edges smells like bananas, so it is also called banana flower. Nandian Bamboo: Its leaves are green in summer and spring, red in autumn and winter, and its fruit is red and very beautiful. 5. Pittosporum: Pittosporum is an evergreen shrub. The leaves are obovate, slightly curly, bloom in summer, and can resist harmful gases.