178 GRASSES OF IOWA. 



DISTRIBUTION. 



Iowa. Ames (Crozier, Stewart, Bessey, Hitchcock); Weaver, 

 133 (Ball, Zmunt, Fisher) ; Armstrong (Cratty) ; Dysart (Miss Sir- 

 rine) ; Belknap, 825 (Rankin); Hamilton County (P. H. Rolfs); 

 Battle Creek, 943 (Preston) ; Cherokee (Wakefield) ; Greenfield 

 (Stewart); Spirit Lake, 555 (Ball); Alt. Pleasant, 877 and 1917 

 (Mills); New Albin 1924. Jefferson 1288, Humboldt 880, Slater 

 (Pammel) ; Tama County, 275 (Sirrine) ; Mt. Pleasant, 684 (De 

 Witt); Clinton, 275 (Ball); Decatur County (Fitzpatrick) ; West 

 Union, 1441 (Whitmore) ; Colfax (Mead) ; Emmet County, 1062 

 (Cratty) ; Iowa City (Hitchcock) ; Hamilton County (P. H. Rolfs) ; 

 Marshalltown (Eckles) ; minor form, Armstrong (Cratty) ; Vinton, 

 13 and 1251 (Ball); Afton Junction (Miller); Clear Lake, High 

 Bridge, Dallas County. Cedar Rapids, northwest corner of state, Lyon 

 County (Shimek); Hamilton to Hancock County (Preston); Keo- 

 sauqua (Shimek). 



North America. Canada (Carson); from Maine south to New 

 Jersey, Ohio, Iowa, Minnesota (St. Cloud, Campbell; Silver Creek, 

 Sandberg), Illinois (Palatine, Pammel), Wisconsin (La Crosse, Pam- 

 mel; St. Croix, Parry) ; Missouri (Carson Station, Eggert) ; Nebraska 

 (North Platte, Pammel) ; Colorado (Ft. Collins, Crandall ; Idaho 

 Springs, Shear) ; Wyoming (Laramie Hills, A. Nelson) ; Montana 

 (Craig) ; Utah (Uintah Mountains, Lamotte Peak, Pammel, Johnson, 

 Buchanan and Lummis), to British Columbia. 



3. CALAMAGROSTIS CANADENSIS var. ACUMINATA. 



Calamagrostis Canadensis var. acuminata Vasey Bull. U. S. Dept. 

 Agrl. Div. Agros. 5: 26. 1897. Kearney. Revision of the N. Am. Species of 

 Calamagrostis. Bull. U. S. Dept. Agrl. Div. Agros. 11: 29. 1898. 



Calamagrostis Canadensis var. robusta Vasey in Wheeler Rep. 6: 285. 



DESCRIPTION-. 



Sharp Pointed Red Top. Sheaths rarely inconspicuously 

 bearded at junction with blade; blade usually short, scabrous-pubescent 

 on the upper (rarely both) surfaces; panicle commonly rather small, 

 more flexuous and more densely flowered than the species, usually dark 

 purple; spikelets larger, 1 \ to 2 lines (3.5-4 mm.) long; empty glumes 

 comparatively narrow, sharp, attenuate, acuminate ; sometimes subfal- 

 cate, somewhat thicker, usually much more scabrous (occasionally almost 

 strigose) ; longer, often considerably (sometimes \ line (.5 mm.)) ex- 

 ceeding the flowering glume. 



