NATIVE GRASSES AND PUCCINIA GRAMINIS 169 



Agrostideae 



Phlciim pratcnse L. This grass is generally naturalized from Kan- 

 sas City, Missouri, north through Nebraska, Iowa, South Dakota, 

 Minnesota, Wisconsin and Illinois. The P. graminis is common on 

 it in the entire region, especially after July. 



Alopecurus pratensis L. The meadow foxtail is frequently culti- 

 vated and has been for years in Iowa and Wisconsin but there is no 

 evidence of its becoming naturalized, so far as I know, in any locality 

 of the region. Puccinia graminis has been found on it in Iowa by 

 the writer. 



Alopecurus genicidatus L. is common throughout the region from 

 Missouri to Illinois and Wisconsin and Minnesota and South Da- 

 kota. I have never seen any of the rust on it. 



Sporoholus cryptandrus Gray. Sand rush grass, on which P. 

 graminis has been reported, is a common grass in Iowa on sandy or 

 gravelly soil in eastern Iowa, Muscatine, Louisa, Clinton and Alla- 

 makee counties to central Iowa, Story, Marshall, Emmet counties 

 and western Iowa from Fremont, Woodbury, Dickinson and Lyon 

 counties. It is common in La Crosse and Crawford counties, Wiscon- 

 sin ; Houston county, Minnesota, to western Minnesota ; Big Stone 

 Lake, Watertown, Brookings, Mitchell and Sioux Falls, South Da- 

 kota. In all this region I did not find a single instance of P. graminis. 

 The Puccinia Sporoboli sometimes occurs in Iowa on this species 

 and on S. neglectus. S. asper. S. cuspidatus and S. vaginiflorus. 



Calainagrostis canadensis Beauv. The Blue-joint grass or red top 

 is widely distributed in Iowa, from Keokuk to Lansing along the 

 Mississippi, west to Fremont county on the south and in the north 

 to Lyon county, Iowa, most abundant in low marshes or sloughs. 

 It is common also in northcentral Illinois from LaSalle to the lakes 

 and throughout Wisconsin and Minnesota ; South Dakota at Water- 

 town, Brookings, Mitchell and Sioux Falls. I made a careful search 

 for P. graminis on this host, but was unable to find any of the rust. 



Agrostis alba L. Red top is generally naturalized and common 

 from Illinois to Kansas City, Missouri, north through Iowa, eastern 

 Nebraska, where it is less common, northwestern Iowa, eastern 

 South Dakota, except in low meadows and along streams, near 

 lakes in northeastern South Dakota and common through Minnesota 

 and Wisconsin. The Puccinia graminis is common on this species 

 everywhere in Iowa, the uredo stage appearing during the middle 

 and latter part of May. For instance, where the grass occurred near 

 barberry bushes as in Forest City, Rock Rapids and Northwood 



