56 POLYPODIACEAE 



7. D. marginalis (L.) A. Gray. In rocky woods and on banks: 



N. S. to Br. Col., south to Ga., Ala., Ark., Kan. and Okl. 



Common throughout the range except in the pine-barrens and 

 east and south of them, there not recorded. 



8. D. spinulosa (Mull.) Kuntze. In rich low woods: Lab. to 



Selkirk and Idaho to Va. and Ky. Also in Europe. 



Common throughout Conn., N. Y., and Pa. 

 N. J. Rare and local in Gloucester, Burlington and Ocean counties, 



north and west of the pine-barrens, thence increasing northward. 



Tertiary, o: Cretaceous, rare: Older Formations, increasing 

 northward. 117-220 days. Sea level-3,980 ft. 



9. D. dilatata (Hoffm.) A. Gray. In mountains: Newf. to Alaska, 



Calif., Idaho, Tenn. and N. Car. Also in Eurasia, Greenland, 

 Japan and the Madeira Islands. 



N. Y. The higher Catskills in Greene and Delaware counties. 

 N. J. Sussex, Warren and Morris counties. 

 Pa. Lackawanna, Pike and Monroe counties. 



Tertiary, o: Cretaceous, o: Older Formations, confined to the 

 north. Not south of the moraine. 117-138 days. 800-4,020 ft. 



10. D. intermedia (Muhl.) A. Gray. In moist woods: Newf. to 



Wise, south to N. Car. and Tenn. 



Common throughout the range, except in the pine-barrens. 



11. D. Phegopteris (L.) C. Ch. Moist woods and thickets: 



Newf. to Alask., Va., Mich, to Wash. Also in Greenl., Eu. 

 and Asia. 



Conn. Rare along the coast, increasing northward. 



N. Y. Not definitely known from L. I. or S. I., reported from the 

 former; rare and local in northern Westchester Co., increasing 

 northward. 



N. J. Local in Sussex Co. ami Warren Co. (according to Macken- 

 zie) ; unknown elsewhere. 



Pa. Luzerne, Pike, Monroe and Schuylkill counties. 



Tertiary, o: Cretaceous, o: Older Formations, rare and local 



northward. 1 17-140 days. Sea lcwI-3,080 ft. 



12. D. hexagonoptera (Michx.). C. Ch. In dry woods and on 



hillsides; Que. to Minn., Ida., La., Kan. and Okl. 



Conn. Rare near the coast, increasing northwestward. 

 N. Y. Rare on L. I. and S. I., increasing northward, and becoming 

 common in the Catskills. 



