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PECOCO Pasture (Photographs 21 through 28) <br />This sampling unit contained both reclaimed and native vegetation areas; the averages reported <br />thus represent an artificial average condition. These data were collected to assist in the <br />management of grazing in the area, rather than to assess revegetation performance. <br />Cover <br />The dominant lifeform in this reclamation area, introduced perennial cool season grasses, <br />accounted for 33.4 percent of total vegetation cover (Table 16). Intermediate wheatgrass <br />provided the majority of this percentage, and smooth brome and meadow brome accounted for the <br />balance. Native perennial cool season grasses and grass-like plants accounted for 15.7 percent <br />of total vegetation cover. Western wheatgrass contributed one-third of this percentage; Agassiz <br />bluegrass was also important. Oniongrass, elk sedge, mountain brome, thickspike wheatgrass, <br />longleaf squirreltail (Elvmus longifoliusl, slender wheatgrass, sheep fescue, basin wildrye, <br />and Letterman needlegrass also contributed measurably to this lifeform's total vegetation cover. <br />Wooly brome (Bromopsis lanafioesl and Junegrass (Koeleria macranthal were also present. <br />Native shrubs provided 21.9 percent of total vegetation cover. Mountain snowberry contributed <br />• nearly two-thirds of this percentage. Saskatoon serviceberry, Douglas rabbitbrush <br />(C~ysothamnus viscidiflorus), and big sagebrush accounted for the balance. <br />One introduced perennial forb, alfalfa, provided all of this lifeform's 16.4 percent of total <br />vegetation cover. Cicer milkvetch was also present. Native perennial forbs accounted for 9.2 <br />percent of total vegetation cover, of which western yarrow provided one-third. One-flower <br />woodsunflower was also important. Other species contributing measurably to total vegetation <br />cover were; blue flax, bracted aster, weedy milkvetch, arrowleaf balsamroot, showy fleabane, <br />groundsmoke, chokecherry lupine (111pinus prunophilusl, James starwort, and American <br />vetch. Big-flowered onion, common yampa, lambstongue groundsel, and mule's ear were also <br />present. Introduced annual and biennial forbs contributed 1.7 percent of total vegetation cover. <br />Yellow sweetclover provided nearly half of this percentage. Prickly lettuce and twolobe <br />speedwell contributed the remaining fraction. Hound's tongue, pennycress, and salsify were <br />also present. Linearleaf collomia, the only native annual forb observed in this unit, contributed <br />0.4 percent of total vegetation cover. <br />r~ <br />LJ <br />18 <br />