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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 fortis 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 disturbarx:e. The major <br />annual forb species include African mustard (~lcomia africana), stickseed <br />• i1 a~la occidentalis) and peppergrass ILaTidium derisiflorum and L.~ <br />oerfoliatum), <br />(2) Threatened a*d Erdannnred Soeoies: <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 IWelch and Neese 1979). Species identified by <br />this survey include Duchesne milkvetch••(A~ str.~ya]us duchesne), ephedra <br />buckwheat~`•iFrioaonm enhedrides), Uintah her idi m lMirabilis aliroes), <br />Jones parthenium (Parthenium ligtilatum) and Graham beardtongue (psl~temon <br />9rahamii). Based on an earlier review tWelsh 1978 and Welsh and Thorns <br />1979), the authors recommend in these reports that these species be <br />treated as follows: <br />o Duchesne milkvetch maintain threatened status <br />o ephedra buckwheat be down-graded to threatened status <br />• <br />II.F-18 <br />