52 POLYPODIACEAE 



lington Co., thence unknown except in Sussex, Warren and 

 Hunterdon counties, all within the drainage of the Delaware. 

 Pa. Monroe, Northampton and Bucks counties. 



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

 apparently increasing northward, especially up the valley of the 

 Delaware. 123-189 days. Sea level-2,300 ft. 



3. Woodsia R. Br. 



Indusium small and inconspicuous, the divisions narrow or filiform; 

 stipes jointed near the base; blades with more or less rusty chaff 

 beneath. i- W. ilvensis. 



Indusium ample, the divisions broad, early spreading; stipes not jointed. 2. W. obtusa. 



1. W. ilvensis (L.) R. Br. On exposed rocks: Lab. to Alaska, 



south to N. Car., Ky. and Iowa. Also in Greenl., Eu. and 

 Asia. 



Conn. Throughout the state, nowhere common. 



N. Y. Reported but not definitely known from L. I., unknown 



on S. I., rare and local in Westchester and Rockland counties, 



increasing northward. 

 N. J. Hunterdon, Somerset and Union counties, northward. 

 Pa. Pike, Wayne, Monroe, Luzerne, Northampton, Montgomery 



and Bucks counties. 



Tertiary, o: Cretaceous, o: Older Formations, increasing north- 

 ward. 1 18-189 days. Sea level-3,000 ft. 



2. W. obtusa (Spreng.) Torrey. On rocks: N. S. and Me. to 



Wise, south to Ga., Ala. and Tex. Also in Alaska and Br. 

 Col. 



Conn. Throughout the state, not common. 



N. Y. Near Greenport, L. I., rare on S.I., thence increasing 



northward. 

 N. J. Monmouth, Hunterdon, and Somerset counties northward. 

 Pa. Northampton, Lehigh, Bucks, Delaware and Chester counties. 



Tertiary, o: Cretaceous, o: Older Formations, increasing north- 

 ward. 117-220 days. Sea level-4,020 ft. 



4. Dennstaedtia Bernh. 

 I. D. punctilobula (Michx.) Moore. In various situations: N. S. 

 and N. B. to Ont. and Minn., south to Ga., Ala. and Mo. 

 Throughout the range, except in the pine-barrens; rare on L. I. 

 and S. I. and southern New Jersey. 



