ILLUSTRATIONS. 



I'ase. 



Fig. 1. In the field 8 



2. The ideal summer range - 12 



3. An "alkali spot," showing characteristic greasewood vegetation ... 14 



4. Fresh-water cord-grass { Spartinu cynosiiroides) 21 



5. Buifalo-grass ( liiinHis dactylouJes) 28 



6. Smooth or Hungarian brome-grass {Broviua inermis) 32 



7. Sheep fescue {Fesiuca ovlna) 33 



8. Slender wheat-grass {Ayropyron tenerum ) 39 



9. Reed meadow-grass {Panicidaria amerimna) 40 



10. Bunch-grass {Poa huckleyann) - 4:1 



11. Bench-bind spear-grass (7'oa anVZ«) . 42 



12. Nevada blue grass {Poa ncvmJensis) 43 



13. AVyoming blue grass ( Poa wlieeUri ) 4.5 



14. Mountain foxtail {Alopecurun ocddentalis) 46 



15. Short-awned brome ( Bromus hreviaristafiis) 47 



16. Rocky Mountain oat-grass (Danthonia Intermedia) 48 



17. Blue grama {Hoatelona oUgosiachya) 52 



18. Tall or side-oats grama ( Bindeloua vurtipendula ) 53 



19. A bit of the " range " in northeast Wyoming 55 



20. Prairie .1 une-grass ( Kochria criatata ) 56 



21. Fine-top salt-grass (5po?-o/;o/((s wf'roif/fN) 57 



22. Salt-grass (Disiichlis npicata) 58 



23. King's fescue ( Festuca kingii) 59 



24. ]M()untain red clover ( Trifoliiim megacephahim) 61 



25. Dakota vetch {Loiitu amtricinuis) 63 



26. Prairie milk-vetch {Aatraguhi^ adsiirycnn} .• 64 



27. Shad scale {Atvlplcx ranescens) 67 



28. Winterfat {EnroHa lanata) 69 



29. Gr«;ascwood {Surcohatiis vermicnlalnn ) 69 



30. Montana bush-iiea ( Thermopaiis montana) 70 



6 



