节节草,拉丁学名:(Equisetum ramosissimum Desf),别名:土木贼、锁眉草、笔杆、土麻黄,草麻黄,木草;为木贼科木贼属植物节节草的全草。四季可采。节节草属中小型植物。多年生,根茎细长入土深,黑褐色。茎细弱,绿色,基部多分枝,上部少分支或部分枝,粗糙具条棱,叶鳞片状,轮生,基部联合成鞘状。孢子囊长圆形,有小尖头;孢子叶6角形,中央凹入。以根茎或孢子繁殖。根茎早期3月发芽,4-月产孢子囊穗,成熟后散落,萌发,成为秋天杂草。广泛分布我国各地,性喜近水,农田杂草,中草药。性味:甘、微苦、平。
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