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<br />Table 6. <br /> <br />Herb Layer Components by Growth-form. <br />Mean Cover Comparison for the <br />Wet Mixed Shrub Community. <br />Growth-form Affected Area Reference Area <br />Annual Forb 0.5 0.4 <br />Perennial Forb 8.7 10.8 <br />Annual Grass - 0.1 <br />Perennial Native Grass 4.3 1.0 <br />Perennial Introduced Grass 2.8 5.4 <br />Mesophytic Shrub 42.5 55.4 <br />Semishrub 1.3 1.3 <br />w = .4 + 8.7 + 1.0 + 2.8 + 42.5 + 1.3 <br />= 56.7 <br />a = 60.0 b = 76.3 <br />I S~~o = 113.4 x 100 <br />136.3 <br />= 83~ <br />