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6~ <br />_17_ <br />1 been encountered on or near the study area; 77 forb, 29 grass, 10 shrub, 8 <br />tree, 3 sub-shrub, 5 grass-like, 3 succulent and 2 bryophyte species. Eight <br />of these are listed as noxious weeds, one as a primary selenium indicator <br />aryl two as secondary absorbers of selenium. Soil sarmles were collected <br />at two .sites suplnrting selenium indicator plant species to determine <br />the actual sail selenium content. No plaZts proposed for threatened or" <br />endangered status were encountered on the study area. <br />The majority of the herbaceous species in grassland and upland sagebrush <br />vegetation on the study area flower in early-late spring,~prnduce mature <br />seeds bi' mid-late srmmer and are largely vegetative in the fall. Areas <br />of high ~roisfi,m (e.g., riparian) may sustain floNnsing over a longer <br />._ period. Many of the trees and shrubs Present in the study area display <br />a similar phernlogy in that ripening fruits are produced by July. " <br />NOXIOUS WEEDS <br />The smst recent listing of noxious weeds (State Noxious Weed Seed Require- <br />. meats Recognized in the Futninistration of the Federal Sea3 Act, USDA, January, <br />1978) was consulted to determine wk>°ther any of the species listed in Appen- <br />dix Coccurred on the study area. The following noxious weeds were en- <br />countexed. <br />1. Acrropvmn repens - quackgrass <br />2. Cardaria ~scens -hairy whitetnp <br />3. Centaurea~repens_ - russian knapdeed <br />4. Cirsium arvense-- canad<i thistle <br />5. Chorispora tenella - rnrc'on bluemustard <br />6. Convolvulus arvensis -field bindwa~d <br />7. Plantago lanceolata - bur]chorn plantain <br />. 8. Rtarex cn. spas -curly dock <br />Three of the above species, oonmon bluam~stard, field bindweed and tur]chorn <br />plantain, wore represented in production samples fran the grassland type on <br />the affected area, while field bindweed and buckhorn plantain were also re- <br />presented in Dover sartples fmn this type. Pnc>!horn plantain was the ,cost <br />manna of the Chan acmnnt.i ivl far 4.3^. (35.3 lhs/acre) of the total <br />vegetation production on the site and 1.GE of the fatal ground cover <br />• (Revised March 2006) Attachment 2.05.6{2}-1-22 <br />