Ceratopteris

• water sprite

  Aquatic fern of tropical America often used in aquariums.

• floating fern

  Pantropical aquatic fern.

Also contains

• pepperwort

  Any of several water ferns of the genus Marsilea having four leaflets.

• pillwort

  European water fern found around margins of bodies of water or in wet acid soil having...

• regnellidium

  Small latex-containing aquatic fern of southern Brazil.

• floating-moss

  Free-floating aquatic ferns.

• mosquito fern

  Small free-floating aquatic fern from the eastern United States to tropical America;...