A -Yarrow ( Achillea lanu-losa ) 



Ag-Slender whea+gnass (Agropyron teneram) 



An-Androsace ( Androsace diffLXsa) 



Ar-Sweet sag's ( Artemisia discolor) 



As-Aster ( Aster frondeu-s ) 



D -Tall larkspur (Delphinium barbeyi) 



L -Peavine ( La+hyrCus leucanthus) 



La-Evening primrose ( Lavauxia flava) 



112655'— 19. (To face page 71.) 



F.G. 26.-Comparative vegetative cover on range (A) graced annually by sheep prior to seed maturity, and on plot (B) protected from grazing for five successive years. 1913-1917. 



