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木贼科(Equisetaceae)植物世界约30种,除大洋洲外,各地均有分布。我国产10余种。木贼科隶属于木贼纲(Equisetinae)楔叶亚门(Sphenopsida),是古老的一大类群,古生代泥盆纪即发现其化石,至石炭纪达到极盛。植物体高大,同鳞木属(Lepidodendron)、封印木属(Sigillaria)共同构成石炭纪森林植被,参与煤层的形成。中生代浙次灭绝。现仅存两属:木贼属(Hippochaete Milde)及问荆属(Equisetum)。广布于我国各省区,资源丰富。它们是古代楔叶亚门具有较强生命力
There are about 30 species of Equisetaceae in the world, except for Oceania. I made more than 10 species. Equisetidae belongs to the genus Sphenopsida of Equisetinae and is an ancient group. The Devonian in the Paleozoic discovered its fossils and reached the height of the Carboniferous. The plant is tall and tall, and Lepidodendron and Sigillaria together form the Carboniferous forest vegetation and participate in the formation of coal seams. Mesozoic Zhejiang extinction. There are only two genera: Hippochaete Milde and Equisetum. Widely distributed in our provinces and regions, rich in resources. They are the strong vitality of the ancient cuneate.