IOWA ACADEMY OF SCIENCES. 1^1 



S. heferophylla Pursh. Winneshiek Co. In shallow water, 

 frequent. 



NAIADACE^. 



Potamogeton fluitans Roth. Winneshiek, Allamakee, and 

 Clayton Cos. Common in the Upper Iowa river. 

 P. paudflorus Pursh. Winneshiek Co. Frequent. 



CYPERACE^. 



Cyperus esculentus L. Clayton Co. Wet ground, frequent. 



Eleocharis palustris E. Br. Winneshiek Co. Wet ground, 

 frequent. 



Scir%)us lacustris L. Winneshiek, Allamakee, Clayton, and 

 Dubuque Cos. Wet ground and in water, common. 



S. fluviatilis Gray. Allamakee Co. Very common in the 

 sloughs of the Mississippi river. 



iS'. atrovirens Muhl. Winneshiek, Allamakee, and Dubuque 

 Cos. Wet ground, frequent. 



Carex intumescens Rudge. Dubuque Co. Wet woods, fre- 

 quent. 



C. squarrosa L. Clayton and Dubuque Cos. Wet woods, fre- 

 quent. 



G. hystricina Muhl. Winneshiek Co. Wet ground, fre- 

 quent. 



C. pennsylvanica Lam. Winneshiek Co. Dry soil, com- 

 mon. 



C. stipata Muhl. Winneshiek Co. 



C. vulpinoidea Mx. Winneshiek Co. 



G. rosea Schkuhr. Winneshiek Co. 



G. cephalopliora Muhl. Winneshiek Co. 



G. straminea Willd., var. apt era 'Booth. Winneshiek Co. The 

 same as G. tenera Dew. 



GRAMINE.E. 



Panicum sanguinale L. Winneshiek Co. 

 P. capillare L. Winneshiek Co. 

 P. dichotomum L. Winneshiek Co. 

 P. dichotomum L., var. villosa Vasey. Winneshiek Co. 

 P. latifoUum L. Winneshiek, Allamakee, and Clayton Cos. 

 Woods, frequent. 



