POACEAE: HORDEAE 35 
Spikes stout and dense, 3-8 cm. long, usually purplish. 
; 4. A. violaceum, 
Awns spreading, spikelets flattened, remote on the rachis. 
Empty scales awnless, 5. A, vaseyi. 
Empty scales awned. 6. A. gmelini. 
With horizontal rootstocks or stolons. 
Spikelets spreading, much flattened, 7-13 flowered. 7. A. smithii. 
Spikelets erect slightly if at all flattened. 
Flowering scales densely pubescent, spikelets 5-9 flowered. 
8. A. dasystachyum. 
Flowering scales glabrous, 3-7 flowered. 9. A. pseudorepens. 
1. Agropyron richardsonii Schrad. 
Lincoln, O’Neill; Valentine. 
2. Agropyron caninum (1l.) R. & S. 
In the western part of the state. Newark; Thedford; Whitman. 
3. Agropyron tenerum Vasey. Slender Wheat-grass. 
Common in the western part of the state. Belmont; Crawford; Dis- 
mal River; Hat Creek Basin; Kearney; Halsey; Newark; Newport; 
North Platte; Valentine. 
4. Agropyron violaceum (Hornem.) Vasey. Purplish Wheat-grass. 
In the foot-hills in the western part of the state. Box Butte County. 
5. Agropyron vaseyi S. & S. 
In the western part of the state. Chadron; Fort Robinson. 
6. Agropyron gmelini Scribn, & Sm. 
In the western part of the state. Chadron. 
7. Agropyron smithii Rydb. Western Wheat-grass. 
Agropyron spicatum Scribn. & Sm. 
Common in prairies all over the state. Alliance; Bassett; Chadron; 
Halsey; Kearney; Lincoln; Minden; Neligh; Plummer Ford; Red 
Cloud; Thedford. : 
8. Agropyron dasystachyum (Hook.) Vasey. 
In the western part of the state. Chadron; Glen. 
9. Agropyron pseudorepens Scribn. & Sm. 
In moist soil throughout the state. Anselmo; Belmont; Callaway; 
Kearney; Minden; Newcastle; Thedford; Valley County. 
2, Lolium. 152. 
Empty scale shorter than the 8-20 flowered spikelet. 
Flowering scales 5-6 mm. long, awnless. 1. L. perenne. 
Flowering scales 7-8 mm. long, at least the upper awned. 
2. L. italicum. 
Empty scales longer than the 5-7 flowered spikelets. 3. L. tomentulum. 
1, Lolium perenne L. Ray-grass. 
Introduced in various Pages but not common. Fort Robinson; Lin- 
coln; Valentine. 
2. Lolium italicum R. Br. Italian ray-grass. 
Lolium multiflorum Lam. 
Lincoln. 
3. Lolium tomentulum L. Bearded darnel. 
