MANUAL OF THE GRASSES OF THE UNITED STATES 



235 



9. Agropyron albicans Scribn. and Smith. (Fig. 451.) Similar 

 to A. dasystachyum; glumes awn-pointed, about 1 em long; awn 



Figure U7.—A, Agropyron dasystachyum, X L (Griffiths 488, Wash.) B, A. elmeri, X 1. (Type.) 



of lemma 1 to 1.5 cm long, divergent 

 and dry hills, South Dakota to 

 Alberta, and Colorado (fig. 452). 



10. Agropyron 

 griffithsii Scribn. 

 and Smith. (Fig. 

 453.) Resembling 

 A. albicans, differ- 

 ing chiefly in hav- 

 ing glabrous lem- 

 mas. 01 — Open 

 dry, sandy or al- 

 Xorth and" South 

 Wyoming, and Colorado. In 



hen drv. 01 



•Plains 



Figuee 448.— Distribution of 

 A. dasystachyum. 



kaline 

 Dakota 



soil, western 



Figure 449.— Agropyron riparium, X L (Nelson 3965, Wyo.) 



the type specimen the lemmas are smooth but in several other specimens 

 the lemmas are scabrous. Possibly only a glabrous form of .4. albicans. 



