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19 <br />• Table 1. Means (X) and Standard Errors <br />(5-) for <br />Percent (°6) <br />Cover <br />for the Grassland Vegetation <br />Type--MaxwellxMine. <br />Species <br />Herbaceous <br />Non -Herbaceous <br />or Category <br />X(".) <br />S -XM <br />X(;) <br />Sx (;) <br />Bare ground <br />33.5 <br />5.4 <br />Litter <br />14.0 <br />4.5 <br />Rock <br />0.2 <br />0.2 <br />Annual forb <br />1.0 <br />0.7 <br />Perennial forb <br />0.5 <br />0.5 <br />Agropyron smithii <br />0.6 <br />0.4 <br />Artemisia frigida <br />7.5 <br />4.4 <br />Astragalus missouriensis <br />.o <br />1.8 <br />1.8 <br />Bouteloua gracilis <br />31.3 <br />5.3 <br />Carex eleocharis <br />3.5 <br />1.5 <br />• .� Chenopodium albescens <br />1.0 <br />1.0 <br />Chrysothamnus nauseosus <br />-- <br />-- <br />Haplopappus spinulosus <br />0.5 <br />0.5 <br />Penstemon sp. <br />-- <br />-- <br />Petalostemon candidum <br />-- <br />-- <br />Plantago sp. <br />0.2 <br />0.2 <br />Salsola iberica <br />1.0 <br />i.0 <br />Sitanion hystrix <br />-- <br />-- <br />Sphaeralcea coccinea <br />0.7 <br />0.4 <br />Xanthocephalum sarothrae <br />2.7 <br />1.8 <br />Total <br />52.3 <br />3.1 <br />•_ <br />