POLYPODIACEAE 6 1 



14. Pteridium Scop. (Pteris L.) 

 P. aquilinum (L.) Kuhn. In thickets or open situations: 

 throughout most of N. Am. Nearly cosmopolitan. 



Throughout the range in some of its numerous forms, apparently 

 less common in Conn, than elsewhere in our range. 



15. Cryptogramma R. Br. 

 C. Stelleri (S. G. Gmel.) Prantl. On rocks: Lab. to Alaska, 

 Pa., Iowa, Wise, and Colo. Also in Asia. 



A rare and local species, confined in our area to regions with M ~J 

 limestone or trap-rock formations, but not coextensive with these 

 formations in the range. It has so far been collected only from 

 New Haven, Kent, Brookfield and Salisbury, Conn., and from ' 

 Godwinville, Morton and Dyke, Bergen Co., N. J. a 



16. Pellaea Link. 

 P. atropurpurea (L.) Link. On rocks: Ont. to Br. Col. and 

 Mackenzie, Ga., Miss., Tex. and Cal. Reported from Mex. 



Conn. Bolton and Guilford, thence increasing northwestward 



towards the limestone regions. 

 N. Y. Orange, Dutchess, Greene and Ulster counties. 

 N. J. Sussex, Morris, Warren and Hunterdon counties. 

 Pa. Northampton, Monroe, Lehigh and Chester counties. 



Tertiary, o: Cretaceous, o: Older Formations, most common on 

 limestone, but found also on gneiss and trap rocks. 123-220 days. 

 Sea level-2,700 ft. 



17. Cheilanthes Sw. 

 C. lanosa (Michx.) Watt. On rocks: Conn, and southern 



N. Y. to Ga., west to Kan. and Tex. 



Conn. New Haven. 



N. Y. Not uncommon in Manhattan and the Bronx and up the 

 Hudson Valley to near Poughkeepsie; unknown elsewhere. 



N. J. Scattered from Hunterdon, Union and Essex counties north- 

 ward. 



Pa. Monroe, Northampton, Bucks, Berks and Chester counties. 

 Tertiary, o: Cretaceous, o: Older Formations, more common on 



limestone and on trap than other rocks. 123-220 days. Sea 



level-2,080 ft. 



