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ERO Resources <br />these sites is reported to be less than on finer textured sites. Colorado <br />• wildrye has been found to be characteristic of trampling and of shallow <br />soils. This species will maintain itself well under both of these <br />conditions. Colorado wildrye furnishes adequate forage only during the <br />spring. Another spring forage producer is cheatgrass. This species is <br />palatable and used only during the early spring. In addition, cheatgrass <br />has been found to exhibit characteristics that allow it near complete <br />utilization of surface soil moisture and continuous seed production. <br />Cheatgrass is favored on sandy soils. This species is not tolerant of <br />heavy grazing pressures. Indian ricegrass is characteristic of sandy soil <br />areas and is a known sand binder. This species is also valuable as <br />forage. Blue gramagrass is characteristic of loamy soils and an excellent <br />source of forage. <br />Annual grasses and forbs contribute substantial numbers to all the <br />vegetation types occurring. This life form occurs in annual <br />forb - dominated stands in areas of high, perennial disturbance. The major <br />annual forb species include African mustard (Malcomia africana), stickseed <br />• (lala occidentalis) and peppergrass (LeTidium densiflorum and 1, <br />oerfoliatum), <br />• <br />Several species considered to be restricted to the Uintah Basin and <br />included as threatened and endangered species were found by Welsh in his <br />survey of the permit area (Welsh and Neese 1979). Species identified by <br />this survey include Duchesne milkvstch,•(Astr�yajus duchesne), ephedra <br />buckwheatF(Fri000num epbgdrides), Uintah her idi m (Mirabilis alipes), <br />Jones parthenium ( Parthenium limlatum) and Graham beardtongue (psrrstemon <br />arahamii). Based on an earlier review (Welsh 1978 and Welsh and Thorne <br />1979), the authors recommend in these reports that these species be <br />treated as follows: <br />• Duchesne milkvetch maintain threatened status <br />• ephedra buckwheat be down- graded to threatened status <br />II.F -18 <br />