Equisetum arvense is a very easy weed to identify because it is very different from other common plants. This plant has only stems and no leaves. Because Equisetum arvense is not an ordinary plant, it belongs to small and medium-sized ferns of Equisetaceae and Equisetum. Like ordinary plants, they all have leaves, but equisetum arvense is an exception. Although the name has cursive characters, it is not a weed at all.

The rhizome of Equisetum arvense is not green like other plants, but dark brown, and it has only slender branches. There are parts like bamboo. After pulling it out, there will be a lush juice flowing out, green.

Another characteristic of Vitex negundo is that as long as one plant grows, it will rapidly develop into a large area. Moreover, this plant is not picky about the growing environment, especially in some humid grasslands and bushes, and it also has strong cold resistance and barren resistance.

It is precisely because of these advantages that this plant is widely distributed in China, almost all over the country, often distributed in wet grasslands, ditches, or some wet sandy land, hillsides and meadows. It is also a common harmful grass in farmland, and it is still difficult to remove it.