IOWA ACADEMY OF SCIENCES. 133 



FILICES. 



Polypodium vulgare L Clayton Co. Frequent at pictured 

 rocks below McGregor. 



Adiantum pedatum L Winneshiek, Allamakee, Clayton, and 

 Dubuque Cos. Rich, upland woods, frequent. 



Pieris aquilina L Winneshiek, Allamakee and Clayton Cos. 

 Upland woods, frequent 



Gheilanthes lanuginosa Nutt. Allamakee and Dubuque Cos. 

 On the face of cliffs, common locally 



Pellaia atropurpurea Link. Winneshiek, Allamakee, and 

 Dubuque Cos. Cliff crevices, frequent 



Asplenium Jilix-fcemina Bernh. Winneshiek and Clayton Cos. 

 Woods, frequent. 



Gamptosorus 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^E. 



Botrychium virginianum Swartz. Winneshiek and Allamakee 

 Cos. Rich woods, frequent. 



MARCHANTIACE^E. 



Marchanta polymorpha L. Winneshiek, Allamakee, and 

 Dubuque Cos. Wet rocks, frequent. 



