36 SANDUSKY FLORA. 



A. spinulosum, Swartz. 



Frequent in rich woods. 



A. SPINULOSUM INTERMEDIUM, D. C. Eaton. 



Frequent. Neither this nor the species seen on 

 Peninsula or Islands. 

 A. thelypteris, Swartz. 

 Common. 



ASPLENIUM, L. Spleenwort. 



A. ANGUSTIFOLIUM, Michx. 



Infrequent. 



A. EBENEUM. 



Common in Furnace woods, Vermillion, "Cedar 

 Point," J. R. Schacht. 

 A. filix-foemina. Bernh. 



Common. Not on Peninsula or Islands. 



A. THELYPTEROIDES , MicllX. 



Perkins and Florence ; scarce. 



CAHPTOSORUS, Link, Walking fern. 

 C. rhizophyllus, Link. 



On sides of sandstone rocks, Vermillion River, 

 S. Florence ; on limestone, three places in Mar- 

 garetta, Catawba, Kelley's sland. 



CYSTOPTERIS, Bernh, Bladder Fern. 

 C. bulbifera, Bernh. 



Frequent. Islands. 



C. fragilis, Bernh. 



Common. Kelley's Island. 



DICKSONIA, L'Her. 



D. PILOSIUSCULA, Willd. 



Vermillion River ; frequent. Big woods, Per- 

 kins ; scarce. 



ONOCLEA, L. 



O. sensibilis L. Sensitive Fern. 



Common. Not on the Islands. 



