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name and year first observed for each species. Harrington (1964) and <br />Weber and Johnston (1979) were used as sources for scientific names, • <br />and Beetle (1970) and Nickerson, et al. (1976) were used as sources <br />for common names. <br />RESULTS <br />The original vegetation on the Seneca :CI Mine was composed <br />primarily of upland big sagebrush shrublands, mixed mountain <br />shrublands, and scattered stands of quaking aspen. Data from the <br />upland sagebrush and mixed mountain shrubland reference areas provide <br />a means for comparing and evaluating the results obtained on the <br />reclaimed areas. <br />Reference Areas <br />u <br />Upland Big Sagebrush Shrubland Reference Area. The upland big <br />sagebrush reference area occurs on a north-facing slope at an <br />elevation of 7100 feet at the extreme southern end of the permit area <br />(Figure 1). In all, 71 species were observed growing in the upland <br />big sagebrush reference area (Table 1). The dominant shrub species <br />in this type are mountain big sagebrush (Artemiaia tridentata ssp. <br />vaseyana) which occurs with a mean cover of 5 percent and 100 percent <br />frequency and rabbitbrush (Chrysothamnus vtisei3i.florus) (2.2 percent i <br />cover and 60 percent frequency) (Table 2). The major herbaceous <br />species include Letterman needlegrass (Sttipa Zettermanii) (5.5 <br />percent cover and 90 percent frequency), little sunflower <br />(Xelianthella uniflora) (3.0 percent and 50 percent frequency) and <br />.• <br />4 <br />