water fern

Definitions of water fern
  1. noun
    ferns that grow in water
    synonyms: aquatic fern
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    clover fern, pepperwort
    any of several water ferns of the genus Marsilea having four leaflets
    Pilularia globulifera, pillwort
    European water fern found around margins of bodies of water or in wet acid soil having small globose sporocarps
    Regnellidium diphyllum, regnellidium
    small latex-containing aquatic fern of southern Brazil
    Salvinia auriculata, Salvinia rotundifolia, floating-moss
    free-floating aquatic ferns
    Azolla caroliniana, Carolina pond fern, floating fern, mosquito fern
    small free-floating aquatic fern from the eastern United States to tropical America; naturalized in western and southern Europe
    Ceratopteris pteridioides, floating fern, water sprite
    aquatic fern of tropical America often used in aquariums
    Ceratopteris thalictroides, floating fern
    pantropical aquatic fern
    Marsilea drummondii, common nardoo, nardo, nardoo
    Australian clover fern
    Marsilea quadrifolia, water clover
    water fern of Europe and Asia and the eastern United States distinguished by four leaflets resembling clover leaves
    type of:
    any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
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