PLANT SUCCESSION AND RANGE MANAGEMENT. 
59 
dominating plants of the early-weed stage were practically identical 
with those reported in zone 2. Of the late- weed stage species the fol- 
lowing were conspicuous : tongue-leaved violet, evening primrose, low 
pea vine, Mexican dock, butterweed, plantain, sneezeweed, and false 
cymopterus. These species, it will be recalled, have been listed as 
characteristic forerunners of the more permanent species of the late- 
HHIfll Yellow Brush .and Needle Grass 
( | Mountain Oder 
Fig. 24. — Bed ground used for several successive years, snowing zones of vegetation and 
range depletion. 
weed stage, a fact which is strongly substantiated in this instance. 
While they are distinctly second-weed stage species, they may be 
classed as transitional successionally between the early-weed stage 
and the second-weed stage when the latter is characterized by 
turfed plants, such as blue foxglove, sweet sage, and yarrow. 
Only a small portion of the herbage in this belt is relished by sheep. 
The feed is low in quality and unless cropped early in the season 
has practically no forage value. 
