A., Yarrow (Achillea lanulosa). 



Ar, Sweet sage (Artemisia discolor). 



Co, Slender-leaved collomia (CoUomia linearis) , 

 D, Low larkspur (Delphinium menziesii) . 



Pg, Knotweed (Poli/gonum aviculare). 

 Pt, Plantain (Plantago tweedyi). 



So, Tansy mustard (Sophia inoisa) . 



Y, Tongle-leaved violet (Yiola Knguaefolia) . 



112655°-19. (To follow page 57.) 



Fig. 23. — Sheep driveway used annually until 1915, when protection plot was established showing character of vegetation in 1917. 



