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ERO Resources <br />and Sandberg bluegrass - 0.1x. Important fortis occurring in this <br />• vegetation type are fleabane daisy - 0.9X, globemallow - <O.lx, cushion <br />phlox - <O.lx, long-leaf phlox - <0.1X and peppergrass - <O.lx. The mean <br />cover values for grass species account for 88x of the total herb cover in <br />this type (Figure 4, Table 61. <br />Scattered shrub species occurring on the wildrye steppes include big <br />sagebrush, shadscale, fourwing saltbush, spirry horsebrush, little <br />rabbitbrush and greasewood. Big sagebrush and shadscale are the dominant <br />shrub species present in this type. Mean cover values for these dominants <br />are 4.Ox and 2.5X, respectively. Other shrubs important in this type with <br />their corresponding mean cover values are fourwirg saltbush - 1.3x, <br />greasewood - 1.1x, spiny horsebrueh - 0.3X and little rabbitbrush - <br /><O.lx. Half-shrubs are leas important in this type than other vegetation <br />types studied. These half-shrubs are snakeweed and prickly pear both with <br />mean cover value of less than O.lx (Figure 4, Table 61. Mean densities <br />for shrubs mentioned above are big sagebrush - 1919/Ha, shadscale - <br />1662/Ha, fourwirg saltbush - 1887/Ha, greasewood - 181/Fla, spiny <br />• horsebrush - 100/Ha and little rabbitbrush - 37/Ha (Table 71. For <br />half-shrubs present mean density values are snakeweed - 131/Ha and prickly <br />pear - 6/Ha. The Larger shrubs, such as greasewood, are somewhat <br />restricted to benches and areas where roots can reach water through <br />fractures. The presence of greasewood on the wildrye steppes is as <br />unsuspected as its occurrence in the sagebrush uplands and juniper <br />woodlands. Superficial fracturing in all of these sites is the apparent <br />reason for this distribution. <br />Primary productivity on the Colorado wildrye steppes is moderate in <br />comparison with the remainder of the permit area. Mean biomass measured <br />is 30.3 g/m2. Colorado wildrye accounts for 62x of the above figure or <br />a mean production rate of 18.8 g/m2• Other grasses of importance <br />include cheatgrass - 4.0 g/m2, Indian ricegrass - 0.8 g/m2, <br />squirreltail grass - 0.4 g/m2 and Sandberg bluegrass - 0.2 g/m2 <br />(Figure 5, Table 9>. Important fortis with respective mean values include <br />fleabane daisy - 3.4 g/m2, lorg-leaf phlox - 0.2 g/m2, globemallow - <br />• <br />II.F-44 <br />