ILLUSTRATIONS. 



I'nge. 



Fig. ] . Tripsacum pilosum Scribn. & Merrill 6 



2. Paspalum rosei Scrilm. & Merrill 10 



3. Panicum badinm Soribner & ]Merrill 11 



i. Muhlenbergia densiflora Scribn. & Merrill 19 



5. Agrostis rosei Scribn. & Merrill - 22 



6. Avena micrantha Scribn 23 



7. Tristachya laxa Scribn. & Merrill 24 



S. Panicum nitidum Lam 32 



9. Panicum eatoni Nash - - - - 33 



10. Panicum nitidum octinodum ( Smith ) 34 



11. Panicum 8C( )parium Lam - 3o 



12. Panicum scoparium Lam - - 36 



13. Panicum pubescens Lam 37 



14. Andropogon bakeri Scribn. & Ball 40 



15. Andropogon mississippiensis Scribn. & Ball 41 



16. Panicum combsii Scribn. & Ball - - 42 



17. Aristida combsii Scribn. & Ball 43 



18. Aristida intermedia Scribn. & Ball 44 



19. Elymus arkansanus Scribn. & Ball - 45 



20. Elymus ausstralis Scribn. & Ball 46 



21. Elymus brachystachys Scribn. & Ball 47 



22. Elymus diversiglumis Scribn. & Ball - 48 



23. Elymus glabriflorus Scribn. & Ball 49 



