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lanuginosum), a native fern, averaged 4.6 percent of total vegetation cover. Introduced annual and biennial (orbs, primarily hound's tongue, averaged 2.4 percent of total vegetation cover. Native perennial cool season grasses averaged 11.1 percent of total vegetation cover. Agassiz bluegrass accounted for nearly halt of this but elk sedge (Carex geveri) was also important. Total vegetation cover averaged 82.6 percent. Standing dead, litter, and bare soil cover averaged 0.2, 13.8, and 3.4 percent, respectively. Species density averaged 39.2 species per 100 sq. m. Herbaceous Production (Table 14) Total herbaceous production for all species other than alfalfa averaged 981.4 pounds per acre. No alfalfa was observed in this native reference area. Sagebrush Reference Area (Photographs 17, 20, and 21) i Cover (Table 15) II Native perennial cool season grass was the dominant life form in this unit with 42.2 percent of total vegetation cover. Sheep fescue (Festuca brachvohvlla s:>p. coloradensis) accounted for more than half of this. Agassiz bluegrass, Montana wheatgrass (Elvmus lanceolatus fm. a s), and slender wheatgrass were also important. ~~ Native shrubs averaged 33.2 percent of total vegetation cover. Big sagebrush accounted for more than half of this average. Mountain snowberry was also important. Saskatoon II serviceberry and alkali sagebrush (Seriphidium arbusculum ssp. lonai o m) were minor contributors. Native perennial fortis averaged 22.8 percent of total vegetation cover. ~ Weedy milkvetch (Astragalus miser var. oblongifolius), one-flower woodsunflower ~~ (Helianthella uniflora), and Pacific aster (Virgulaster ascenders) were this life form's major cover contributors. Western yarrow, arrowleaf balsamroot (f3~samorhiza sa i a), fringed thistle (Cirsium centaureae), sulphur flower (Frio Drum i umbellatum), and American vetch were also important. I 14 I • •