Cent.'. Nat. Herb., Vol. 22. 



Plate 44. 



A. Lake Ellen Wilson and Gunsight Pass. 



The zigzag line is the trail from (iiinsight Pass to Sperry Chalets. This area is nearly all Arctic- 

 Alpine, but the dark portions in the lower corners are Hudsonian and covered with small trees. 



B. An Arctic-Alpine Rock Slide. 



A close view showing the characteristic vegetation of numero\is kinds of small herbs, mostly with 

 showy flowers. In manv places in the park rocks break into thin flat slabs, which at high altitudes 

 in level places are pressed down by the weight of the snow until they resemble carefully laid 

 pavements. 



