What is the differnce between ferns and pteropsida??

i have tried to search over web but found nothing!

2 answers

Ferns are part of the classification of pteropsida.

http://www.thefreedictionary.com/Pteropsida

http://botanydictionary.org/pteropsida.html
They produce spores n their body is gametophyte right? so wat does that mean and can they also be called pteridophytes?