Page:Parsons How to Know the Ferns 7th ed.djvu/134

{| SPORANGIA ON OR BENEATH A REFLEXED MARGIN In the spring or early summer its solitary spreading frond, light-green and delicate in color, might almost be confused with the Oak Fern.
 * GROUP IV
 * FERTILE AND STERILE FRONDS LEAF-LIKE AND SIMILAR;
 * }