Page:Parsons How to Know the Ferns 7th ed.djvu/196

 instead of tapering base of the frond, by the strongly revolute margins of the fertile frond, and by its long stalk.

From the Massachusetts Fern it may be distinguished by its forked veins, the less revolute margins of the fertile frond, and by its thicker texture and deeper green.

This species closely resembles the Marsh Fern. The less revolute margins of the fertile frond, the simple veins, its thinner texture, and its more distant fruit-dots aid in its identification. It is found in woodland swamps from New Hampshire to the Indian Territory.