genus regnellidium

Noun
  1. One species of aquatic or semiaquatic fern (synset 112979230)
    is a type of: fern genus - genera of ferns and fern allies
    member holonym: regnellidium, regnellidium diphyllum - small latex-containing aquatic fern of southern Brazil
    belongs to: family marsileaceae, marsileaceae - clover ferns

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