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4-103 <br />• Sa2aoQa tibehtica, tansy-mustard Deacuha~n~a aophtia, and common <br />blue-mustard Chohiapoha #ene2~a. <br />Production <br />Estimated herbaceous production for the Greasewood Shrubland <br />ranges from 37.8 g/m2 to 165.7 and averages 72.6 g/m2 or 647 <br />pounds per acre. Cheatgrass produces an overwhelming 74 percent <br />of the total biomass (54.0 g/m2). Total forb production is <br />13.7 g/m2. See Table 4.8-4. <br />Density <br />Shrub density is high with 6,165 shrubs per acre. Big sagebrush <br />is the most abundant shrub (3,241 shrubs per acre), followed by <br />• greasewood (1,002 shrubs per acre), shadscale saltbush A~h~pQex <br />con6eh~tibo~~a (609 shrubs per acre), and winterfat Khaachen~nn~kovtia <br />2ana~a (269 shrubs per acre). Average height for all shrubs is <br />86 centimeters, ranging from 131 centimeters for greasewood to <br />36 centimeters for broom snakewood Xan~hocephaCum aaho#hhae. See <br />Table 4.8-5. <br />Diversity <br />Species richness among the Munger Canyon vegetation types is <br />highest in the Greasewood Shrubland (index = 17.88), although <br />equitability or the evenness of cover distribution among plant <br />species is relatively low (index = 0.66). The low equitability <br />is related to the dominance of greasewood and cheatgrass. See <br />. Table 4.8-6. <br />