A field guide to ferns and their related families :
[Book]
northeastern and central North America /
Boughton Cobb and Elizabeth Farnsworth and Cheryl Lowe for the New England Wild Flower Society ; illustrations by Laura Louise Foster and Elizabeth Farnsworth.
Second edition.
Boston :
Houghton Mifflin Co.,
2005.
xiv, 417 pages :
illustrations (some color), color map ;
19 cm.
The Peterson field guide series.
"Sponsored by the National Wildlife Federation, and the Roger Tory Peterson Institute".
Includes bibliographical references (p. 398-402) and index.
Ferns and fern allies of northeastern and central North America