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13 <br />. The Pinyon/Juniper Vegetation Community occurs on steep west and southwest <br />facing slopes at elevations typically below 7,000 feet. Dominant species include <br />Utah juniper (Juniperus osteosperma) and Rocky Mountain juniper (Juniperus <br />scopulorum) in the tree stratum. Pinyon pine (Pinus edulus) is also present. <br />Dominant understory species include Gamble oak, mountain snowberry, Indian <br />ricegrass (Oryzopsis hymenoides), and annual grasses (Western Resource <br />Development Corporation, 1982). Rock outcrops are a major component of this <br />unit. The soils are typically shallow and droughty compared to the soils <br />supporting the other tree-dominated vegetation communities. <br />Steep to very steep canyon walls along Hubbard Creek and its tributaries support <br />the Spruce/Fir Vegetation Community. Elevations nominally range from 6,800 to <br />8,000+ feet. This community tends to be comparatively dense and supported by <br />soils reflecting more mesic conditions. Dominant tree species include <br />Englemann spruce (Picea engelmannir), Colorado blue spruce (Picea pungens), <br />and subalpine fir (Abies lasiocarp) at higher elevations. Dominant understory <br />species include bearbeny (Arctostaphylos uva-ursr)and avariety ofother shrubs <br />and herbaceous species common to the Oak Vegetation Community but at lower <br />densities. As with other vegetation communities dominating drainages, a <br />comparatively narrow riparian zone including a small channel and associated <br />wetland fringe is typically present. Rubble land is also common within this <br />• vegetation community. <br />• <br />