IOWA ACADEMY OF SCIENCES. 169 



G. stipata Muhl. Shelby and Johnson Cos. 



G. gravida Bailey. Johnson Co. 



G vulpinoidea Mx. Decatur, Appanoose, and Johnson Cos. 



G. rosea Schkuhr. Decatur, Shelby, and Johnson Cos. 

 Woods, common. 



G sparganoides Muhl. Decatur Co. 



G. cephalophora Muhl. Johnson Co. 



G. tribuloides cristata Bailey. Decatur Co. 



G. scoparia Schkuhr. Johnson Co. 



G. straminea Willd. Decatur Co. 



G. straminea br-evior Dewey. Decatur, Shelby and Johnson 

 Cos. 



G. straminnea aptera Boott Johnson Co. 



GRAMINE.E. 



Spartina cynosuroides Willd. Decatur and Appanoose Cos. 

 Sloughs, common. 



Panicum leibergii Schribn. Decatur Co. Meadows, frequent. 



P. sanguinale L. Decatur, Wapello, Van Buren, and John- 

 son Cos. Fields and waste places, common. 



P. capiUa,re L. Decatur, Wapello, and Johnson Cos. 



P. virgatum L. Decatur Co. Low prairies, frequent. 



P. lanuginosum Ell. Decatur and Appanoose Cos. Meadows, 

 frequent. 



P. depauperatum Muhl. Johnson Co. 



P. crus-gaUi L. Decatur, Wapello, and Johnson Cos. Wet 

 grounds, common. 



P. macrocarpon Le Conte. Decatur and Johnson Cos. Woods, 

 frequent. 



Setaria glauca Beauv. Decatur, Appanoose, Wapello, and 

 Johnson Cos. Fields and waste places, common. 



S. viridis Beauv. Decatur and Johnson Cos. With the pre- 

 ceding. 



S. italica Kunth. Decatur, Van Buren, and Shelby Cos. 

 Waste places, frequent. 



S. verticillata Beauv. Johnson Co. Near dwellings, fre- 

 quent. 



Genchrus tribuloides L. Decatur, Wapello, Van Buren, and 

 Johnson Cos. Sandy soil, common. 



Leersia oryzoides Swartz. Decatur Co. 



Zizania aquatica L. Johnson Co. Ponds, frequent. 



