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<br />and snowberry Svmpharicoroos spp. are important shrubs. Common <br />graminoids include blue grams Boutelous gracilis, western wheat <br />Brass Asropyron smithii, needle and threat Stipa comata, squirrel <br />tail Satan ion histrix, mutton grass Poa fendleriana, and red <br />three-awn Aristida longiseta. These are found mainly in the <br />open area. <br />j.4 Grassland <br />The open grasslands are dominated by blue grams grass <br />Boutelous gracilis and ring muhly Muhlenbergia torreyi. Other <br />common graminoids include side oats grams Boutelous curtipendula, <br />red three-awn Aristida loneiseta, squirrel tail Satanion histrix, <br />western wheat grass Asropvron smithii, sand dropseed Sporobolus <br />cryptandrus and little bluestem Schizachyrium scoparium. <br />Important forbs include several cactus species, fringed sage <br />Artemisia frieida, and snakeweed Gutierrezia.sarothrae. <br />The open grasslands contain scattered ponderosa pine, pinyon pine, <br />one seeded juniper and skunk brush. <br />3.5 Vascular Plant Inventory <br />• Table 1 includes all the vascular plant species identified <br />from the study area during the fall of 1980. One hundred thirty <br />species in forty-four families are represented. There are six <br />species of trees. twenty-two shrubs or subshrubs, seventy-three <br />forbs and twenty-nine graminoids. Three species are not native <br />to the study area. No species inventoried are listed on the <br />Federal endangered or threatened species lists. <br />Twenty-six species collected are classified as weeds in <br />Colorado (Thornton, Barrington and Zimdahl, 19?4) and are <br />indicated in Table 1. None of the weeds are classified as <br />noxious weeds. The Astraealus spp. may be a selenium indicator <br />species. This will be determined in 1981 when the plants <br />flower. These species can only be differentiated by flower <br />morphology. Several of the species are poisonous to animals <br />under certain conditions. These species include Prunus <br />vireiniana, Del hinium virescens, Astraealus spp.; Lup~nus <br />ar¢enteus, Asc a ias spp., Qu~ercus gambell and Seneclo <br />wart o des Stoddart k Smith 19$5). <br />• <br />2-5 <br />