|Common Names -||Synonyms -|
|Authority - Poit. ex Rich.||Total Number of genera - 1|
|Gymnosperm or Angiosperm? - Gymnosperm||Total Number of species - 620|
|Plant forms - Tree ferns|
|World Distribution - Tropical America|
|Comments - True Ferns .The exact number of species is not known, Iincludes the world's tallest tree ferns, which reach heights up to 24 m. They are also very ancient plants, appearing in the fossil record in the late Jurassic|
|1 - Alsophia.|
2 - Cyathea.
3 - Dioksonia.
4 - Hemitelia.
5 - Nephelea.