1, according to the cultivation form, it can be divided into several cultivation types, such as multi-headed chrysanthemum, single chrysanthemum, big chrysanthemum, cliff chrysanthemum, artistic chrysanthemum and desk chrysanthemum; According to the appearance of petals, it can be divided into garden hug, retreat hug, reverse hug, disorderly hug, open heart hug, flying hug and other cultivation types. Chrysanthemums in different types are named by various varieties. ?
2. Chrysanthemum is a perennial herb with a height of 60- 150 cm. Stems erect, branched or unbranched, pilose. Leaves alternate, short-stalked, ovate to lanceolate, 5- 15 cm long, pinnately lobed or cleft, cuneate at the base, white pubescent below, coarsely serrated or deeply lobed at the edge, cuneate at the base, with stalks. The heads are solitary or clustered at the top of stems and branches, with a diameter of 2.5-20 cm and different sizes, and one or several clustered at the top of stems and branches. The flowering period is 9- 1 1 month. Stamens, pistils and fruits are mostly undeveloped.
3. Chrysanthemum grows vigorously and has strong germination ability. A chrysanthemum can be divided into thousands of buds after many times of coring. Some varieties have soft and many branches, which are convenient for making various shapes, forming beautiful shapes such as chrysanthemum tower, chrysanthemum bridge, chrysanthemum fence, chrysanthemum pavilion, chrysanthemum gate and chrysanthemum ball. It can also be cultivated into big chrysanthemum, cliff chrysanthemum, ten kinds of brocade, bonsai, etc., which are changeable and spectacular, adding countless ornamental works of art to the annual chrysanthemum exhibition. Chrysanthemum can be used as medicine to treat diseases, and taking or drinking chrysanthemum tea for a long time can make people live longer. Su Zhe, a poet in the Song Dynasty, said: "Nanyang Baiju has outstanding achievements, and there are many elderly people living on the pool."