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Exhrbil J- Vegefafian Information Colorado butterfly plant (Guava neomexieuna ssp. eoloradensis) Colorado butterfly plant occurs on subirrigated, alluvial (stream deposited) soils on leveo OOr slightly sloping floodplains and drainage bottoms at elevations of 1,524-1,951 meters (5, 6,400 feet). Colonies are often found in low depressions or along bends in wide, active, meandering stream channels a short distance upslope of the actual channel. The plant requires early-to mid-succession riparian (river bank) habitat. It commonly occuratensiso on wetter dominated by redtop (Agrostis stolonifera) and Kentucky bluegrass (Poop ) sites; and wild licorice (Glyayrrhiza lepidota), Flodman's thistle (Cirsium flodmanii), cur ytap uisetum laevigatum) on driec gwnweed (Grindelia squarrosa), and smooth scouring rush (Eq sites. Both these habitat types are r~sually rote ~ushest(Juncus spp~), and attailse(Typha spp )> communities dominated by sedges (Carex spp.), and dry, upland, shortgrass prairie. Typical habitat is open, without dense or overgrown vegetation (USFWS 2000). There was no habitat for Colorado butterfly plant within the Expansion Area. Most of the Expansion Area North was dry and dominated by weedy species. In areas near the river where there was sufficient moisture, associated species were not present, or only comprised a small portion of the overall vegetation. Weedy species were common throughout this area and the streambanks were severely eroded. Ute ladies'-tresses (Spiranthes diluviulis) Ute ladies'-tresses is an endemic orchid that occurs primarily in seeCennial streamseaThenorch'td or gravel soils near wet meadows, springs, lakes, ponds, or p establishes in open grass and forb-dominated riparian areas that are not overly dense or overgrown. Most populations occur as small, scattered groups occupying relatively small areas within the riparian system. p°pul etrennial streams wethin an elevational range of 4 000 toe? 000 gravel bars, and old oxbows along p feet. Most sites are subirrigated and seasonally flooded, remaining moist into the summer (USFWS 1992). There was no habitat for the Ute ladies'-tresses orchid within the Expansion Area. Most of the Expansion Area North was dry and dominated by weed species. In areas neaz the river where there was sufficient moisture, vegetation was too dense for this species. Weedy species were common throughout this area and the streambanks were severely eroded. The CNHP was also contacted and a database search was performed for Township 1 South, Range 67 otentiallctoccus (within a0twso-m le radius ofdthetExpans on AreatDwarf(milkweed uncialis) p Y occurs on shortgrass prairie on sandstone derived soils and gravelly or rocky slopes. owever, n habitat for this species was observed during the site visits performed by Greystone biologists. There are no CNHP designated Potential Conservation Areas located within the Expansion Area. The CDOW provided a list of state species of special concern that potentially occur within the project area (CDOW 2005a). The CDOW data indicated no state threatened or state special concern plant species within the Expansion Area. S-5 1898-Frei l l2 8xbibits_(4.20.05).doc