IOWA ACADEMY OF SCIENCES. 109 



NYMPH^ACE^. 



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

 mon in the sloughs of the Mississippi river. 



Nymphceaodorata. Ait. Winneshiek and Allamakee Cos. Ponds 

 and sloughs, frequent. 



Niiphar advena Ait. Winneshiek and Allamakee Cos. Ponds, 

 frequent. 



PAPAVERACE^. 



Sanguinaria canadensis L. Winneshiek, Allamakee, Clayton, 

 and Scott Cos. Rich woods, frequent. 



DicentracucuUaria'DC. Winneshiek, Allamakee, and Scott Cos. 

 Rich woods, common. 



CRUCIFER^. 



Dentaria laciniata Muhl. Winneshiek and Scott Cos. Rich 

 woods, frequent. 



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

 quent. 



G hirsuta L. Winneshiek -and Allamakee Cos. Damp soil, 

 frequent. 



Arabis canadensis L. Winneshiek, Allamakee, and Clayton 

 Cos. Woods, frequent. 



A. conjinis 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 carolinianaWBlt. Winneshiek Co. Rocky woods, infre- 

 quent. 



Gamalina sativa Crantz. Winneshiek Co. Frequent in flax 

 fields. 



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

 quent. 



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

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

 common. 



iV". armoracia Pries. Winneshiek, Allamakee, and Dubuque 

 Cos. A frequent escape. 



Erysimum cheiranthoides L. Winneshiek, Allamakee, and 

 Dubuque Cos. 



Sisymbrium canescens Nutt. Winneshiek Co. 



