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-'' - RANGE SITE N0. 289 Page 2 <br />CLAYEY F007HILLS <br />August 1975 <br />} <br />• 3• Native (potential) Vegetation <br /> Western wheatgrass dominates the cover, although big sagebrush <br /> gives. the site an open brushland aspect. Black sage is also present <br /> in places. Nuttongrass, Indian ricegrass, squirreftail, Junegrass <br /> and ocher grasses combine with western wheatgrass to make up well <br /> over half the plant community. Beardless wheatgrass is present in <br /> northerrL portions of the site. Forbs are scattered Ch rough but <br /> make up a minor part of the plant community. Some of the most <br /> common are buckwheat, globemallow, penstemon, and locos or milk- <br />- vetches. Others which grow in parts. of this community are yarrow, <br />' balsamroot, and aster. •Douglas rabbitbrush and prickly pear are <br /> commonly occurring plants. and there may be an occasional 4-wing <br /> saltbush or winterfat. On more moist parts of the site a few call <br /> shrubs common to higher elevations may be present, and pinyon or <br />- juniper may show up. The latter are confined to occasional trees <br /> or patches under natural conditions, however, due to fire and other <br /> factors. <br />Native (potential) Vegetation and Guide for Determining Range <br />Contlition. <br />' Percentage composition by o•eight of the pr-incipal species may <br /> total as much as: <br />~ .Le~lsrTOn ~./tcn'~EAia!: /J J.,.~a^~~i~• ~ <br />• Western wheatgrass 50 <br /> Big sagebrush iS 20 <br /> Indian ricegrass 5 <br /> Wuttongrass 5 <br /> Eeardless wheatgrass 1/ 5 <br /> Douglas rabbitbrush'. 5 <br /> Others (listed above) IS <br /> 1/ Not present at southern locations. <br /> Tree species most likely to grow on the site are Utah juniper, <br /> crte-seed juniper and pinyon pine. Approximate ground cover is <br /> 40 percent. <br />• ~ Species most likely to invade the site or increase from [race <br />_ amounts are juniper (at upper elevations}, rubber rabbitbrush, . <br /> Colorado rubberweed, snakeweed, chea[grass and a-nual weeds. <br /> Shadscale and greasewood move into some drier parts of the site, <br />._ _ especially those adjacent to salty soils. Big sagebrush commonly <br /> becomes dominant as the range condition deteriorates and nay make <br /> up nearly all the vegetation. Other plants which increase in some <br /> places as the condition deteriorates are black sage and Douglas <br /> rabbitbrush.• <br />•~ <br /> <br />