GRASSES OF IOWA. 



217 



Ames (Crozier, Hitchcock, 7 sS. Pammel and Cram ; 752, Pammel, 

 Carver), Big Prairie, (Pammel); Emmet County, Armstrong, [057 

 ( C ratty ) ; 10, Spirit Lake (Shimek) ; Greenfield (Stewart); Calhoun 

 County (Rigg) ; Slater (Fawcett, Tener). 



Fig. 152. Phragmites communis - a, apikelet; b, 

 outer empty glumes; c, single floret showing palea, 

 stamensand stigmas. (Div. Agros. U. S. Dept. Agrl. ) 



North America. Abundant in swamps and wet places th 

 the United States; from New England, New York (Parry), Ohio 

 (Lancaster, Dr. Bigelow), to Florida; west to Alabama and Texas; 

 north through the Rocky Mountains to Colorado (La Porte, Pammel), 

 Utah (Duchesne River, Pammel and Stanton, 298), Nebraska. Minne- 

 sota (Centre City, Sandberg, 640), Wisconsin (La Crosse, Pammel), 

 Dakota. Wyoming ( Tensleep P. ()., T. A. Williams), California to the 

 Pacific Coast; from British Columbia to Manitoba and Nova Scotia. 



