Other
American Fern Society
Visit this site for information on the history and ecology of ferns. How many species of ferns exist today? What is the primary means of reproduction in ferns? Provided are the answers to these questions and more about the history and...
CK-12 Foundation
Ck 12: Biology: Leaves
[Free Registration/Login may be required to access all resource tools.] Discusses different types of leaves and seasonal changes in leaves.