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(b) Location <br />• (See Overlay pl.) <br />(c) Food. <br />The vegetative types (brush 8 shrub) in the <br />north half of the planning unit consists of <br />the following key browse plants: Artemisia <br />tridentata (big sagebrush) (the palatable <br />sub-species); Amelanchier alnifolia (service- <br />berry); uercus gambelii (gambel oak); <br />Cercocarpus montanus (mountain mahogany) and <br />Purshia tridentata (bitterbrush) and associated <br />grass species (cool season). <br />The southern portion differs from the northern <br />half in that it lacks bitterbrush as a vege- <br />tative component, has less amounts of gambel <br />oak in its higher elevation, and has a xeric <br />saltbush type in the lower elevations. The <br />northern portion is more mesic and is relatively <br />• void of the saltbush type. <br />This variation in browse composition and the <br />relatively similar utilization on several <br />browse species (Cerro, Quga, Amal, Artr) in <br />GMU 52 and (Artr, Cerro, Quga, Amal) in GMU 53 <br />suggests that there is no one single key <br />browse species. Rather there are from 4 to 5 <br />key species over the entire planning unit and <br />greater than 2 key species within certain <br />critical areas depending on the location in <br />planning unit. <br />Comprising 62 percent of the composition in <br />GMU 52 are Artr, Cerro, and Putr. In GUM 53 <br />Artr, Cerro and Amal comprise 86.2 percent of <br />the composition (the species mentioned above <br />bearing the greater proportion of winter <br />• utilization). <br />NF-WL-III-2 4/76 RWM <br />