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. daspstachyum. 

 Flowering scales glabrous, 3-7 flowered. 9. A. pseudorepens. 



1. Agropyron richardsonii Schrad. 

 Lincoln, O'Xeill; Valentine. 



2. Agropyron canium (L.) R. & S. 



In the western part of the state. ^ Newark; Thedford; Vrhitman. 



3. Agropyron tenerum Vasey. Slender Wheat-grass. 

 Common in the western part of the state. Belmont; Crawford; Dis- 

 mal Rive'r; Hat Creek Basin; Kearney; Halsey; Newark; Nev/port; 

 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. Arropyron 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 places 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. 



