#family_Ceratophyllaceae__Ceratophyllaceae  coextensive with the genus Ceratophyllum: hornworts
  supertype:  #magnoliid_dicot_family__magnoliiddicotfamily  family of dicotyledonous flowering plants regarded as among the most primitive of extant angiosperms
  member of:  #order_Ranales
  member:  #genus_Ceratophyllum__Ceratophyllum  constituting the family Ceratophyllaceae: hornworts
     member:  #hornwort.aquatic_plant  any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams

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