130 IOWA ACADEMY OF SCIENCES. 



L. canadense L. Winneshiek Co. 



Trillium erectum L. Winneshiek Co. Rich woods, frequent. 



T. nivale Riddell. Winneshiek Co. Rocky woods, frequent. 



PONTEDERIACE^. 



Heteranthera graminea Vahl. Allamakee Co. Frequent in 

 Upper Iowa river. 



COMMELINACE^. 



Tradescantia virginica L. Winneshiek, Allamakee, and 

 Clayton Cos. Rich soil, frequent. 



JUNCACE^. 



Juncus tenuis Willd. Winneshiek, Allamakee, Dubuque, 

 and Jackson Cos. Fields snd waysides, common. 



TYPHACEtE. 



Typha latifolia L. Winneshiek and Allamakee Cos. Ponds 

 and river margins, frequent. 



Sparganium eurycarpum Englm. Winneshiek Co. Wet 

 places, frequent. 



ARACEyE. 



Ariscema tripMjllum Torr. Winneshiek, Allamakee, Clay- 

 ton, Dubuque, and Scott Cos. Rich woods, frequent. 



A. dracontium Schott. Winneshiek and Dubuque Cos. Rich 

 woods, infrequent. 



Symplocarpus fcetidus Salisb. Winneshiek and Allamakee 

 Cos. Wet ground, infrequent. 



LEMNACE^. 



Spirodela polyrrhiza Schleid. Winneshiek and Dubuque Cos. 

 Ponds and river sloughs, common. 



ALISMACE^. 



Alisma plantago L. Winneshiek and Dubuque Cos. Shal- 

 low ponds and ditches, frequent. 



Sagittaria variabilis Engl. Winneshiek, Allamakee, Clay- 

 on, and Dubuque Cos. Mud flats, ditches, and shallow water, 

 common. 



