134 POLYPODIUM 



GRAY or HOARY POLYPODY: 



Polypddium polypodioiides. 

 {P. incanum.) 



Fronds 2 to 7 inches long^ evergreen, deeply 

 pinnatifid with blunt divisions; similar in appear- 

 ance to those of the common polypody, but may be 

 distinguished by the stipe and under surface of 

 the frond being thickly covered with gray or 

 brownish scales fastened at the center. 



Fruit dots rather small, without indusia, and 

 near the margin. 



Found on rocks and the trunks of trees, Vir- 

 ginia, Ohio, Iowa and southward. 



