IOWA ACADEMY OF SCIENCES. 109 



-NYMPHiEACEiE. 



Nelumbo lutea Pers. Allamakee, and Clayton Cos. Very com- 

 mon in the sloughs of the Mississippi river. 



>Xymphceaodorata. Ait. Winneshiek and Allamakee Cos. Ponds 

 and sloughs, frequent. 



Nuphar advena Ait. Winneshiek and Allamakee Cos. Ponds, 

 frequent. 



PAPAVERACE^E. 



Sanguinaria canadensis L. Winneshiek, Allamakee, Clayton, 

 and Scott Cos. Rich woods, frequent. 



DiceutracucullariaDQ. W T inneshiek, Allamakee, and Scott Cos. 

 Rich woods, common. 



CRUCIFER.E. 



Dentaria laciniata Muhl. Winneshiek and Scott Cos. Rich 

 woods, frequent. 



Cardamine rhomboidea DC. Winneshiek Co. Damp soil, fre- 

 quent. 



C hirsuta L. Winneshiek and Allamakee Cos. Damp soil, 

 frequent. 



Arabis canadensis L. Winneshiek, Allamakee, and Clayton 

 Cos. "Woods, frequent. 



A. confinis Watson. Winneshiek and Allamakee Cos. Woods, 

 frequent. 



A. lyrata L. Winneshiek, Allamakee, Clayton, and Dubuque 

 Cos. Rolling woods, common. 



A. dentata T. & G. Winneshiek Co. Woods, infrequent. 



Draba caroliniana Walt. Winneshiek Co. Rocky woods, infre- 

 quent. 



Camalina sativa Crantz. Winneshiek Co. Frequent in flax 

 fields. 



Nasturtium officinale R. Br. Winneshiek Co. Wet soil, fre- 

 quent. 



N. palustrt DC. Winneshiek, Allamakee, Clayton, Dubuque, 

 and Clinton Cos. Wet soil, margins of ponds and waterways, 

 common. 



N. armoracia Fries. Winneshiek, Allamakee, and Dubuque 

 Cos. A frequent escape. 



Erysimum cheiranthoides L. Winneshiek, Allamakee, and 

 Dubuque Cos. 



Sisymbrium canescens Nutt. Winneshiek Co. 



