Tubular subfamily: the flower heads of this plant are all hermaphroditic tubular flowers with the same shape, or have irregular small flowers, the central flower is not tongue-shaped, and the plant has no milk. Such as Artemisia argyi, Atractylodes rhizome, safflower, chrysanthemum, sunflower, Saussurea involucrata, Xanthium sibiricum, etc.

Linguae subfamily: the whole flower head is composed of liguae flowers, with milk in the body, all small flowers in the flower head, milk in the plant and thorns on the outer wall of pollen grains.

Extended data:

There are about 65,438+0,000 genera and 25,000-30,000 species of Compositae, which are widely distributed all over the world, but few in tropical areas. There are about 200 genera and 2000 species in China, which are produced all over the country.

There are many kinds of compositae plants, many of which have rich economic value, such as lettuce, lettuce, chrysanthemum, Jerusalem artichoke and so on. Sunflower seeds, sunflower seeds and Xanthium sibiricum seeds can be pressed into oil for edible or industrial use; Rubber can be extracted from rubber grass and chamomile.

Baidu encyclopedia-compositae