47 



Agropyron caninoides Beal. (Bearded Wheat-grass).— Tliis wheat-grass occurs 



mostly as a bimch grass; the bunches small with stoutish, erect stems; heads 



long, close, and well awned. It vvobably is rare, though it was found in fair 



qua'utity on the borders of a mountain brook and extending well up on the 



adjacent hillsides. Woods Creek, August 9 (3940). 

 Agropyron caniiiuni R. & S. (Bearded Wheat ghass).— Somewhat resembling 



the preceding but smaller, with shorter leaves. Probably of the plains rather 



than the mountains. Lara- 

 mie River, July 31 (3458). 

 Agropyron dasystachyum 



subvillosuni S. iV H. — It 



is especially valuable upon 



saline lands and responds 



with an increased yield to 



more favorable situations. 



Pine Bluffs, July 5 (3604); 



Colorado- Wyoming line, 



July 22 (3S04); Evanston, 



July 27 (3836). 

 Agropyron divergens Nees. 



(BUNCII WUEAT-GUASS). — 



A bunch grass, the stems 



and leaves densely tufted, 



18 to 30 inches high ; heads 



long, narrowly spike-like, 



with long, divergent, 



twisted awns. Common in 



the foothills on dry, stony 



ridges and slopes. Readily 



eaten by stock, especially 



before the awns have de- 

 veloped and after they have 



fallen off. Laramie Hills, 



June 16 (3181); Green Top, 



June 29 (3243); Sheep 



Mountain, July 3 (3298). 

 Agropyron pseudorepens S. 

 • & S. (False Couch-grass, 



lig. 20). — Forming dense 

 bunches, the numerous 

 stems stout, erect as a 

 whole, but somewhat bent 

 at base, spikes 4 to 6 inches 

 long, awns short. Pro- 

 nounced a most excellent 

 grass for hay purposes, both 



on accountof its quality and its heavy yield. Itwouldseem that some of the other 

 wheat-grasses that form a uniform sod could be used to better advantage than 

 this bunch-grass on grounds which are to be seeded to permanent meadow. Pme 

 Bluffs, July 6 (3634) ; Woods Creek, August 9 (3965) ; Battle Lake, August 17 (4064). 

 Agropyron richardsoni Schrad. (Richardson's Wheat-grass).— In a general way 

 resembling the preceding, but growing mostly as scattering, individual speci- 

 mens ; the spikes conspicuously awned. It occurs mostly on the edges of clear- 

 ings or in open Avoods. Hardly abundant enough to have much significance in 

 this range. Woods Landing. August 7 (3923) ; Grand Encampment, August 13 

 (3978) ; Cooper Hill, August 22 (4408). 



Tig. 20.— False Couch-grass (Agropyron pseudorepens) : a, 

 empty glumes ; b, florets. 



