5o 



POLYPODIACEAE 



i. Schizaea J. E. Smith. 



S. pusilla Pursh. In wet pine-barrens: N. J. Also in Newf. 

 and N. S. 



Locally common in and, in our area, confined exclusively to the 

 pine-barrens of New Jersey,* and to Seaside Park along the coast 

 in Ocean Co. 



2. Lygodium Sw. 

 L. palmatum (Bernh.) Sw. In low woods and thickets: 

 N. H. and Mass., south to Fla., Ky. and Tenn. 

 Conn. Rare in the eastern part of the state. 

 N. J. Saddle River, Bergen Co., rare; increasing southward; 



not recorded along the coast and at Cape May. 

 Pa. Monroe, Luzerne, Carbon, Bucks, and Schuylkill counties. 

 A rare scattered plant. 



POLYPODIACEAE 



Leaves strongly dimorphous, the fertile ones with divisions 

 greatly contracted, brownish, berry-like or necklace-like. 

 Sterile blades deeply pinnatifid; veins freely anastomosing. I. Onoclea. 

 Sterile blades deeply 2-pinnatifid; veins free. 2. Matteuccia. 



Leaves mostly uniform, or if dimorphous the fertile blades flat, 

 the divisions green, not as above. 

 Sori dorsal upon the veins, not marginal. 

 Sori roundish. 



Indusium wholly or partially inferior. 



Indusium wholly inferior, the divisions stellate 



or spreading. 3. Woodsia. 



Indusium attached by its base at one side of 



the sorus, hood-shaped, withering. 5. Filix. 



Indusium, if present, superior. 



Stipes jointed to the rootstock; indusia 



wanting. 18. Polypodium. 



Stipes continuous with the rootstock; indusia 

 present in most species. 

 Indusium (in our species) orbicular- 

 peltate, centrally attached. 6. Polystichum. 

 Indusium, if present, orbicular-reniform, 

 attached at its sinus. 7. Dryopteris. 

 Sori oblong to linear. 



Sori in chain-like rows parallel to the midrib and 

 rachises. 

 Leaves uniform; veins free between the sori 



and margin. 8. Anchistea. 



* See introduction paragraph 38. 



