There are 250-300 kinds of thistles. Most of them are annual or biennial herbs. They are usually hermaphrodite, and a few species are dioecious. Their leaves are relatively large, and most of the edges of the leaves have thorns. They like warm and humid environment with fertile soil, and can grow in mountains, shrubs, grasslands, fields and roadsides.
Distributed in China, Hebei, Henan, Shandong, Shaanxi, Jiangsu, Zhejiang, Jiangxi, Hunan, Hubei, Sichuan, Guizhou, Yunnan, Guangxi, Guangdong, Fujian and Taiwan Province provinces. Both Japan and Korea are distributed. It grows in hillside forests, forest margins, shrubs, grasslands, wasteland, fields, roadsides or streams at an altitude of 400-2 100 meters.
breeding method
1, seed propagation
In July and August, when the seeds are ripe, they can be harvested. If the seeds are over-ripe, they will be easily scattered and difficult to receive. Sow in September of that year or in March and April of the second year after harvest. After ploughing, the land will be leveled into ridges with a width of 1.3m, and then it will be drilled, with a row spacing of 35cm and a soil covering of about 5cm. After the seedlings are neat, the spacing between plants is about 25cm. Plants sown in September of the first year can blossom in the second year.
2, ramet propagation
Before and after Tomb-Sweeping Day, the old plants were dug out and divided into 3-5 plants according to the size of the plant cluster, which were planted in holes, each hole 1 plant, and the row spacing was 33×25 cm.