50 NEW YORK STATE MTTSEUM 



Dryopteris thelypteris (L.) (ii;iy 

 Aspidinni thelypteris 8w. 



Marsh shield fern 

 Swamps and low grounds. Connnon. Summer. 



Dryopteris cristata (L.) Oray 

 Aspidium cristatum Sw. 

 Crested shield fern 

 Swamps. Common. July- August. 



Dryopteris cristata clintoniana ( D. C Eaton) T'ndciw. 

 Aspidium cristatum clintonianum (1). C. Eaton) 



Underw. 

 Wet woods. Rare. August. 



Dryopteris marginalis (L.) (Ti-ay 

 A s ]) i d i u ni m a r g i n a 1 e Sw. 

 Marginal shield fern 

 Rocky banks in deep shade. Common. July-August. 



Y Dryopteris spinulosa (Retz) Kiintzc 

 Aspidium spinulosum ( Sw. ) Kuntze 

 Spinnlose shield fern 

 Wet woods and swamps. Infrequent. 



Dryopteris spinulosa intermedia (Miilil.) Inderw. 

 Aspidium spinulosum var. intermedium D. (3. Eat<m 

 In woods wet or dry. Common. August-September. 



Dryopteris boottii (Tuckm.) Tuderw. 

 Aspidium boottii Tuckm. 



Bootfs shield fern 

 Swamps. Rare. Barton. July-September. 



Phegopteris phegopteris (L.) T^nderw. 



P. p o 1 y p o d i o i d e s Fee 



Long heech fern 

 Rich woods. Frequent. August. 



Phegopteris hexagonoptera (Michx.j Fee 

 Broad l)eech fern 

 Rich woods. Frequent. August. 



