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20.1 percent, which was also lower than study area samples. Within the <br />reference area, perennial forbs were the most abundant group with 25.7 <br />percent cover. Silvery lupine, American vetch, one -flowered hellianthella <br />and aspen peavine were-the most abundant forbs. Perennial grasses had 19.1 <br />percent cover of which Kentucky bluegrass was the dominant grass. Shrubs had <br />28.4 percent cover of which western snowberry and Douglas rabbitbrush had 9.5 <br />and 9.6 percent cover, respectively, while big sagebrush had 8.3 percent <br />cover. <br />Production - The mean annual herbaceous production within the sagebrush <br />grassland vegetation type was 123.4 grams per square meter (Table 3.7 ). <br />Perennial grasses contributed 82.2 grams per square meter to the tota] <br />production while perennial forbs contributed 35.8 grams per square meter. <br />Dominant grasses included Kentucky bluegrass with 21.0 grams per square <br />meter, bluebunch wheatgrass with 18.8 grams per square meter, and western <br />wheatgrass with 22.0 grams per square meter. The dominant forb was silvery <br />lupine with 5.0 grams per square meter. Other miscellaneous perennial forbs <br />contributed 24.5 grams per square meter. <br />Mean annual production within the reference area samples was 185.4 grams <br />per square meter (Table 3.7 ). Perennial grasses contributed the majority of <br />the production with 120.8 grams per square meter. Kentucky bluegrass was the <br />dominant grass with 80.2 grams per square meter, followed by nodding brome <br />with 10.9 grams per square meter. Needlegrasses including letterman and <br />subalpine, contributed 7.0 and 4.3 grams per square meter respectively. <br />Total perennial forbs had 6D.3 grams per square meter of which silvery lupine <br />had 22.0 grams per square meter. Leguminous forbs including American vetch <br />and aspen peavine contributed 16.8 grams per square meter. <br />DenSjtY - Mean density of woody species within the sagebrush grassland <br />study area samples was 54.7 individuals per 50 square meters (Table 3.7 ). <br />19 <br />Exhibit 10, Item 5 Revision Date: 03/06/07 <br />24 Revision No.: PR-02 <br />• <br /> <br />i <br />