Stibkingdom I. PTERIDOPHYTA, Fernlike plants. 



Order i. FILICALES. Ferns. 

 Family I. POLYPODIACEAE R. Br. Polypody family. 



1. WOODSIA R. Br. 



1. W. obtusa (Spreng.) Torr. 

 On limestone rocks; frequent. 



Nova Scotia to British Columbia; Georgia to Arizona. 



2. OYSTOPTERIS Bernh. [i^/Z/A' Adans.]. 



2. O. fragilis (L.) Bernh. {F.fragilis (L.) Unclcrw.]. Frag- 



ile FERN. 



Very common in rocky oak forests, and on ledges and 

 cliffs. 



Newfoundland to Alaska; Georgia to California: al- 

 most cosmopolitan. 



3. O. bulbifera (L.) Bernh. ^F. hdbifera (L.) Undcrw.]. 



BULBET FERN. 



On moist banks and wet rocks; common. 

 Quebec to Wisconsin; Alabama to Arkansas. 



3. ONOOLEA l. 



4. O. sensibilis L. Sensitive fern. 

 Rare and local in swampy places. 

 Newfoundland to Wyoming and the Gulf of Mexico. 



4. NEPHRODIUM Rich. ^DRYOPTERIS h.A^vi%:. 

 ASPIDIUM Swa.rtzl Shield fern. 



5. N. marginale (L.) Michx. [D. marginalis (L.) Gray: A. 

 margiiiale (L.) Swartz]. 



Moist banks of a stream at the Pinnacles. 



Prince Edward Island to Minnesota; Alabama and 

 Arkansas. 

 221] 79 



