IOWA ACADEMY OP SCIENCES. 133 



FILICES. 



PolypocUum vulgare L. Clayton Co. Frequent at pictured 

 rocks below McGregor. 



Adiantum pedatum L. Winneshiek, Allamakee, Clayton, and 

 Dubuque Cos. Rich, upland woods, frequent. 



Pceris aquilina L Winneshiek, Allamakee and Clayton Cos. 

 Upland woods, frequent. 



Gheilanthes lanuginosa Nutt. Allamakee and Dubuque Cos. 

 On the face of cliffs, common locally. 



Pellcta atropurpurea Link. Winneshiek, Allamakee, and 

 Dubuque Cos. Cliff crevices, frequent. 



Asplenium Jilix-fcemina Bernh. Winneshiek and Clayton Cos. 

 Woods, frequent. 



Camptosorus rhizophyllus Link. Winneshiek, andClayton 

 Cos. Rocky glens, infrequent. 



Gystopteris bulbifera Bernh . Winneshiek, Allamakee, Clayton, 

 and Dubuque Cos. Rich soil near base of cliffs, frequent. 



G. fragilis Bernh. Winneshiek and Allamakee Cos. Woods, 

 frequent. 



Onoclea sensibilis L. Clayton Co. Moist ravines, frequent. 



Osmunda claytoniana L. Winneshiek, Allamakee, and Clayton 

 Cos. Low woods, frequent. 



OPHIOGLOSSACE^. 



Botrychium virginianum Swartz. Winneshiek and Allamakee 

 Cos. Rich woods, frequent. 



MARCHANTIACE^. 



Marchanta polymorpha L. Winneshiek, Allamakee, and 

 Dubuque Cos. Wet rocks, frequent. 



