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Plant Species of the Affected Area <br />I. Undisturbed Areas to be Mined -- Sunnv Slopes <br />Vegetation is generally sparse over much the site. Bare ground and <br />rock outcrops are widely distributed. The ground cover ranges from 0 to an <br />estimated 30 percent basal density on the area to be affected. The <br />relative percentages of shrubs, ponderosa pine, and blue grams increases in <br />an upslope. The productivity is estimated to be generally less than about <br />1100 pounds per acre, air-dry for the average moisture year. <br />Overstory <br />Estimated <br />Trees and Shrubs 7, Composition <br />Ponderosa Pine (Pinus ponderosa) T-1 <br />Pinyon Pine (Pinus edulis) T-1 <br />Douglas Fir (Pseudotsuga menziesii) T-1 <br />Rky. Mtn. Juniper (Juniperous virginiana) T <br />Movntein Mahogany (Cercocarpus vontanus-~ 5-15 <br />Geabel Oak (Quercus gaabelii) T-15 <br />Nine bark (Physocarpus sp.) T <br />Mountain Maple (Acer sp.) T <br />Rabbitbrush (Chrysothamnus sp.) T <br />Skunkbush Sumac (Rhus trilobata) T <br />Understory <br />Grasses and Grass-like Plants <br />gsa+cilfs) T-40 <br />fir#V~iYlaiF~=`('lYufcue ap:) T-15 <br />fil~ea~reee (RgrepTron treehyeaulum or <br />~Eif27) T-20 <br />Feac3w (dr'aetee~ opp. ) T-10 <br />E{wii.aMena~~ {9tipa s~.) T-5 <br />Cheatgrass (Bromus tectorun) T-1 <br />Traces: Bluegrass (Poa sp.), <br />Muhly (Muhlenbergia <br />comata), Agrostis or <br />Squirreltail (Sitanion hystrix), <br />sp.), Needle-and-thread (Stipa <br />Calamagrostis. <br />Forbs <br />l~ittgeb!~6egC (~Arte~eeia irigida) T-15 <br />Yltrr~.{1'eieea gleuca) T-10 <br />Pr,^Lly Pear Cactus (Opuntia sp.l T-10 <br />Hairy Gold Aster (Heterothica villosa) T-1 <br />Traces: Bristle Thistle (Carduus sp.), Mullein (Verbascum <br />thapsus), Clover (Trifolium spp.), Yarrow, (Achilles sp.), <br />Dandelion (Taraxacum sp.), Wild Rose (Rosa woodsii) <br />