39 



S. depauperatus (Torr.) Srribn. 



Colorado: L;i Porte, Larimer County, altitude 5,050 feet, sandy soil. 



S. heterolepis A. Oray. 



Iowa: Carroll, altitude 1,240 feet. 



S. lougifolius (Torr.) Wood. 



Iowa: Carroll, altitude 1,240 feet; Sioux City, altitude 1,122 feet, prairies and 



loess. 

 Nebraska: Hastings, prairies. 



S. vagiuaeflorus Vasey. 



Iowa: Carroll, altitude 1,240 feet, roadsides, (oiumon; Sioux City, altitude 1,122 to 

 1,130 feet, common. 



Agrostis alba L. 



Iowa: Carroll, altitude 1,240 feet; Jefferson, altitude 1,118 feet; Logan, Council 



Bluffs, altitude 990 to 1,025 feet. 

 Nebraska: Creto, altitude 1,364 feet; McCook, altittide 2,517 feet, common in low 



grounds, along small streams, in pastures and meadows. 

 A. exarata Triu. 

 Colorado: La Porte, Larimer County; marsh near Cache la Poudre River, altitude 



4,990 feet; Greeley, altitude 4,770 feet, irrigated fiats ; Beaver Creek, Larimer 



T'ounty, altitude .500 feet, in swamps. 



A. scabra Willd. 



Iowa: Sioux City, altitude 1,122 feet. 



Colorado: Beaver Creek, Larimer County, altitude 9,100 feet, in woods of Finns 

 mnrrayamis, along trail, 



Polypogou nionspeliensis (L.) Desf. 



Colorado: Fort Collins, altitude 4,954 feet, along irrigation ditches, 



Calamagrostis canadensis (Miclix. ) Beau v. 



Iowa: .Jefferson, altitude 1,118 feet, low moist prairies and bottoms of small streams, 

 common throughout western Iowa. 



C. purpurasceus R. Br. 



Colorado : Beaver Creek, Larimer County, altitude 10,000 to 11,000 feet, iu dr\^ woods 

 and open places; grows in large bunches. 



Calamovilfa longifolia fHook.) Scribn. 



Iowa: Carroll, altitude 1,240 feet; Sioux City, altitude 1,122 feet. 



Nebraska: McCook, altitude 2,517 feet, common loess bluffs along Missouri River. 



AVENE^. 



Deschampsia flexuosa (L.) Triu. 



Colorado: North Cheyenne Canyon, near Colorado Springs, altitude 6,500 feet. 



D. caespitosa (L.) Beauv. 



Colorado: Beaver Creek, Larimer County, altitude 9,800 to 11,000 feet, iu low 

 grounds and swamps; Long Gulch, altitude 7,775 feet. 



Trisetuni subspicatum Beauv. 



Colorado: Mountain trail. Pikes Peak, altitude 11,720 feet; Beaver Creek, Larimer 

 County, altitude 10,-500 to 11,200 feet, abundant in woods and open places. 



Avena fatua L. 



Colorado: Fort Collins, altitude 4,978 to 5,000 feet; Denver, altitude 5,000 feet, 

 weed in grain fields. 



Danthonia intermedia Yascy. 



Colorado: Beaver Creek, Larimer County, altitude 9,100 feet; Bosworth Ranch, 

 altitude 7,.500 feet, iu open pine woods, abundant. 



