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A plant family of the order Hydropteridales, class Filicopsida, division PTERIDOPHYTA. They are aquatic ferns with quatrifoliate leaves resembling four leaf clover, creeping rhizome, and bean shaped sporocarps.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D043964 · MeSH 2026。
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