#genus_Spirodela__Spirodela  minute aquatic herbs floating on the water surface consisting of a shiny leaflike frond and 2-21 roots
  supertype:  #monocot_genus__monocotgenu__liliopsid_genus  genus of flowering plants having a single cotyledon (embryonic leaf) in the seed
  member of:  #family_Lemnaceae
  member:  #great_duckweed__greatduckweed__water_flaxseed__waterflaxseed__Spirodela_polyrrhiza  cosmopolitan except South America and New Zealand and some oceanic islands

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