*Common Ferns and Fern-Ally Species*A Classification of the Ferns and Fern-Allies (uses frames)*Non-seed plant images at bioimages.vanderbilt.edu*Lord, Thomas R. (2006).
The following classification represents a consensus view (although different authors may use different names for the various groups):*Kingdom Plantae==External links==*Common Ferns and Fern-Ally Species*A Classification of the Ferns and Fern-Allies (uses frames)*Non-seed plant images at bioimages.vanderbilt.edu*Lord, Thomas R. (2006).