50 NEW YORK STATE MUSEUM 



Dryopteris thelypteris (L.i (Jiay 

 A s p i d i 11 111 thelypteris Sw. 

 Marsh shield fern 

 Swamps and low grounds. Common. Summer. 



Dryopteris cristata (L.) (Irav 

 Aspidiuni cristatum Sw. 

 Crested shield fern 

 Swamps. Common. July- August. 



Dryopteris cristata clintoniana (1). C. Eaton) rndcrw. 

 A s p i d i u m cristatum c 1 i n t o n i a n u m (I). C. Eaton ) 



Underw. 

 Wet woods. Rare. August. 



Dryopteris marginalis (L.) Cray 

 Aspidiuni m a r g i n a 1 e Sw. 

 Marginal shield fern 

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



Dryopteris spinulosa (Retz) Kuntze 

 Aspidium spinulosum (Sw.) Kuntze 

 Spinulose shield fern 

 Wet woods and swamps. Infrequent. 



Dryopteris spinulosa intermedia (Miilil.i I iiderw. 

 Aspidium spinulosum var. intermedium D. ( '. Eaton 

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



Dryopteris boottii (Tuckm.) I'lideiw. 

 Aspidium boottii Tuckm. 

 Boott's shield fern 

 Swamps. Rare. Barton. July-September. 



Phegopteris phegopteris Hj.) I'uderw. 

 P. polypodioides Fee 

 Long heech fern 

 Rich woods. Frequent. August. 



Phegopteris hexagonoptera (Miclix.) Fee 

 Broad heech fern 

 Rich woods. Frequent. August. 



