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• included blue flax, nettle-leaf giant hyssop, big-flowered onion, bracted aster, Eaton thistle, <br />showy fleabane, groundsmoke, gumweed, one-flower woodsunflower, showy goldeneye, <br />microseris (Microseris nutans), wild tarragon, common yampa, curly dock, lambstongue <br />groundsel (Senecio integerrimus), and mule's ear. <br />Introduced annual and biennial (orbs provided 7.5 percent of total vegetation cover. Twolobe <br />speedwell accounted for most of this percentage, but Jim Hill mustard and salsify also <br />contributed measurably to this lifeform's total vegetation cover. Hound's tongue, prickly <br />lettuce, yellow sweetclover, field pepperweed (Neolepia ca estris), Devil's shoestrings, and <br />pennycress were also present. Native annual and biennial (orbs accounted for 4 percent of total <br />vegetation cover. Linearleaf collomia provided more then half of this percentage. Together, <br />western rockjasmine, baby blue-eyes, and microsteris contributed the remaining half. Three <br />introduced annual grasses, cheatgrass, Japanese brome and wheat, contributed 3.4 percent of <br />total vegetation cover. Big sagebrush accounted for most of the 0.6 percent of total vegetation <br />cover attributable to shrubs. Chokecherry, mountain snowberry, and Arkansas rose (Rosa <br />arkansana) were present but did not contribute measurably to total vegetation cover. <br />Total vegetation cover averaged 64.2 percent. Standing dead, litter, bare soil, and rock cover <br />averaged 0.6, 23.4, 9.8, and 2 percent, respectively. Species density averaged 31 species per <br />100 sq. m. <br />Alfalfa produced an average of 237.5 oven-dry pounds of biomass per acre (Table 14). <br />Together, all other species produced an average of 2,350 pounds per acre. Total biomass <br />production averaged 2,587.4 pounds per acre. <br />Total shrub (and subshrub) density averaged 299.4 shrubs per acre (Table 15). One native <br />subshrub, Arkansas rose, averaged 4 individuals per acre. Native shrubs averaged 295.4 <br />individuals per acre; most of these were mountain snowberry, but big sagebrush was also <br />important. Saskatoon serviceberry and chokecherry were minor contributors. <br />• <br />17 <br />