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• cover are Louisiana sage (AR,temi~ia (udoviciaaal, wing eriogonum IE~iogonum <br />u(otum), redroot eriogonum lEa<ogoaum rtocemu~uml, stemless actinea, Wright <br />deervetch ILo.tu~ u~i~fr.t.~~<l, sand lupine (Lupiau~ ommophi.lu~l, rock goldenrod <br />1letnadoaio pumtLol, slimflower scurfpea (%ao~aleo #erzui~'Lo~a), and scarlet <br />globemallow. <br />Numerous species of perennial graminoids contribute to cover. <br />These are, in descending order, mutton bluegrass, squirreltail, Indian <br />ricegrass, sideoats grama IQou#e,loua cuatlpendu.lal, galleta IN.iLaaio <br />~ume~ii), needle-and-thread fStipv coma#al, western wheatgrass (Agnopynon <br />~rntthi.il, prairie junegrass (Koe.leaiomac~canthol, and blue grama ll3ou#eLoua <br />~raci.li~1 . <br />Annual forb cover is low, comprising only 1.3 percent of the vege- <br />tative cover. The more common species are spreading fleabane IEaiQe~coa <br />dive~gen~l, dark goosefoot (Chenopu¢'~um otnovi.¢en.~), yellow salsify, and <br />bluebur stickseed ILoppu.lo.2edow~k<iI. Other minor plant species are listed <br />in Table 7. <br />Production <br />Total average production is 44.9 g/2 m2 or about 200 Ibs/acre. <br />Perennial fortis account for about 55 percent of total production. Perennial <br />graminoids comprise approximately 35 percent of the production, composed <br />• primarily of Indian ricegrass, mutton bluegrass, squirreltail, needle-and- <br />thread, and sand dropseed (Spoaoholua cnyp#ortd¢ual. Cheatgrass, an annual <br />graminoid, produces an average of 1.1 g/2 m2, or about 8 percent of the total. <br />Native and introduced annuals produce 1.0 and 1.1 g/2 m2, respectively (Table 81. <br />Shrub Density and Height <br />Total shrub density averages 9.6 shrubs/50 m2 or about 770 shrubs/ <br />acre. Big sagebrush accounts for about 40 percent of the total with 3.8 <br />shrubs/50 m2. Other important species are Gambel oak and true mountain <br />mahogany ITable 9I. <br />Shrub height ranges from 194 cm for skunkbush sumac to 40.2 cm for <br />antelope bitterbrush. Big sagebrush averages about 52 cm. Gambel oak and <br />true mountain mahogany average 154 and 123 cm, respectively. <br />Tree Density <br />Total tree density for the Pinyon-Juniper Woodland vegetation <br />type averages 17.0 trees/250 m2 or about 275 trees/acre. Pinyon pine accounts <br />for about 70 percent of the total with 12.2 trees/250 m2, while Utah juniper <br />averages only 4.8 trees/250 m2 (Table 101. Most stands are moderately dense, <br />but more open stands also are present. Estimated tree heights range from <br />about 2 m to 9 m and average about 7 m. <br /> <br />-11- <br />