POLYPODIACEAE 59 



1. A. pinnatifidum Nutt. On rocks: Conn, and N. Y. to Mo., 



south to Ga., Ala., and Ark. 



A very rare species recorded in our area near Southington and 

 Sharon, Conn., Blairstown, Warren Co., N. J., and in Chester and 

 Philadelphia counties in Pa. Most common on limestone, but by 

 no means confined to it. 



2. A. platyneuron (L.) Oakes. On rocks and banks: Me. and 



Ont. to Colo., south to the Gulf States. Also in S. Africa. 

 Common throughout the range, less so in the pine-barrens than 

 elsewhere; more common, in the north, on limestone than on other 

 rocks. 



3. A. Trichomanes L. On rocks: nearly throughout N. Am., 



except Mex. and Arctic Am. Also in Eu. and Asia. 



Throughout our range except in N. J., south of New Brunswick, 

 Middlesex Co.; not uncommon; reaching' its best development on 

 limestone. 



4. A. pycnocarpon Spreng. (A. angustifolium Michx.). In moist 



woods and shaded ravines: Que. to Wise, south to Ga., Ala., 



Mo. and Kan. 



Conn. Rare in New Haven, Hartford and Litchfield counties, 



increasing northwestward. 

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

 Pa. Berks Co. 



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

 most common on limestone. 1 17-189 days. Sea level-3,980 ft. 



5. A. Ruta-muraria L. Usually on limestone: Vt. to S. Ont. 



and Mich., south to Ala. and Mo. Also in Eu., Asia and 



N. Africa. 



Conn. Rare and local in northern New Haven counties, increasing 



northwestward; unknown from the east or along the coast. 

 N. Y. Westchester and Rockland counties, northward. 

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

 Pa. Northampton, Lehigh and Bucks counties. 



Tertiary, o: Cretaceous, o: Older Formations, almost exclusively 

 confined to limestone rocks, but also on trap rock in N. Y. and Conn. 

 1 17-189 days. Sea level-3,080 ft. 



6. A. montanum Willd. On dry and moist rocks: Conn, and 



N. Y. to Ohio, Ga., Ala. and Ark. 



Conn. Rare and scattered over most of the state, more common 

 northwestward than elsewhere. 



