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木贼类植物属蕨类植物门、木贼纲。木贼纲只有木贼属,约20多种,我国有10种以上,全国各地均有分布。木贼属植物均为多年生草本,茎有明显的节和节间的分化,茎节处多有轮生分枝。茎枝带棱脊和沟,棱脊上常有刺状或疣状突起。叶退化,小形,多数轮生,顶端具齿,基部连接成筒状叶鞘,包围着节间。植物体有或无营养枝与孢子枝之分。孢子囊穗生于茎或分枝的顶端,由盾形孢子叶紧密排列而成,每个盾片下着生6—9枚孢子囊。
Equisetum ferns, genus of genus. There are only about 20 kinds of Euphorbia genus of Euphorbia, about 10 species in China. There are more than 10 species in China and it is distributed throughout the country. Equisetum is a perennial herb, stems have obvious nodes and internode differentiation, and there are more rotund branches at stem nodes. Branch ribs with ridges and furrows, ridges often have spines or knobs. The leaves are degenerate, small-shaped, most of whorled, with teeth at the top, and the base is connected to a cylindrical sheath that surrounds the internodes. Plants with or without vegetative and spore branches. The sporangial spikes are born on the top of stems or branches and are closely arranged by shield-shaped spores. Six to nine sporangia are produced under each scutellum.