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<br />Table 1. Average percent composition for the three vegetation types as determined by an ocular reconnaissance <br />survey on Rock Castle mine South of Hayden, Colorado <br />N <br />H <br />Y <br />i <br />A <br />Species Preaen[ Percent Comp osition <br /> Mountain Sage- <br />Scientific Name Common Name Aspen brush grass <br />Grasses <br />Agropyron smithii Western wheatgrass - T 4 <br />Agropyron subsecundum Bearded wheatgrass 6 - - <br />Agropyron trachvcaulum Slender wheatgrass 2 2 5 <br />Bromopsis carinatus Mountain brome 3 4 2 <br />Bromopsis porteti! Nodding brome 1 1 - <br />Bromus tectorum Downy brome - - T <br />Elymus canadensis Candian rye 3 3 - <br />Elymus cinereus Basin wildrye - - T <br />Festuca ovine Sheep fescue - - 1 <br />Melica bulbosa Melic grass - 1 - <br />Muhlenbergia montane Mountain muhly 1 - - <br />Phle~~n pratensia Timothy T T - <br />Poa ;-:tens is Kentucky bluegrass 10 18 16 <br />Sitanion hystrix Squirreltail grass - - 1 <br />Stipa Columbiana Columbia needlegrass T 1 - <br />Stipa comets Needle-and thread grass 3 3 9 <br />Stipa le[tarmanii Letterman needlegrass - - 8 <br />Carex spp. Sedge 3 2 3 <br /> 32 35 49 <br />Forbs <br />Achilles lanulosa Sheep yarrow 5 8 4 <br />Agastache urticifolia Norsemint 3 1 3 <br />Angelica grayi Sweet angelic 1 - - <br />Arnica latifolia Arnica 1 - - <br />Aster adscendens Manyflowered aster - - 1 <br />Aster engelmanni Engelmann aster 1 3 - <br />Carum gairdnerii Caraway T T T <br />Cogswellia lectocarpa Wild carrot 1 - - <br />Calium borealis Bedstraw 3 1 - <br />Lathyrus leucanthus Aspen peavine 4 1 3 <br />Lupinus plattensis Lupine - T 2 <br />Polemonium occidentalis Jacobs ladder T - - <br />