ILLUSTRATIONS. 
Slender Wheat-grass ( Agropyron rarm) 
Barnyard-grass (Panicum 
Blue ad A ( Bouteloua oligostachya) 
uffalo-grass ( Bulbilis dactyloides) 
Indian Rice (Zizania a aquatica) E 
6. Milk Vetch (Astragalus adsurgens) 
7. Bunch Spear-grass (Poa arida) 
8. Slonoh-+r 5 ier: 
EA d RST M jubatum). 
Wild Vetch (Hosackia ı purshiana). . . 
* 
4 
