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--b~.the_"study~propert~-as-it ~lows`sou~lr-to=the=_W~3}:]:3mS.__ <br />- -Fork -lover. ~ The upper portion of the drainage basin is <br />dominated by the sagebrush-snowberry community. Farth~Y"~~r.s~ <br />'south, in ,areas of alluvial soil deposition that have'aF-' <br />i h;gh .water Cable, the folloc.ing are present: sedge; Ckrex;' <br />spp:; willow,-S'alix spp,.; cattail, Typha sp.; and several <br />.species of grasses and ,forbs adapted to moist habitats: '- <br />' i .. +-- <br />..<. .... <br />r '~ 1', 3: 5. 3 Serviceberry-Sagebrush Community -' . - =' - <br />_ -~-The steep southeast and south slopes are dos~inated <br />~- ~~,by_• a sp=rse distributio2~ of Serviceberry arYd big sagebrush-''~~• <br />i __ Oak'and an occasional shrub of mquntain mahogany, Cercocarpus_ <br />- ~montanics;~and bitteibrush, Purshia tridentata, are also <br />~ present.Mountain-mahogany and -bitterbrush would probably~~=~ <br />`;dominate more'of;the area if it. were not for heavy -=i~% <br />_. browsing upon these species by mule deer and elk. ==~2 <br />_ _ _ rtt, -. ~ . <br />r ___ The dominant grass is bluebunch wheatgrass,-. Agropyxoru_._ <br />~spicatuin.. Other grasses present include: slender wheat- <br />: r._;., <br />;;gzass; Indian ricegrass:, Oryzopsis hymenoides; cheatcjrass,---•r <br />Bromus teatorum; and blueyrass, Poa spp._ A sedge, Cares_..___ <br />--sp:, was sparsely represented under the oak. Forbs <br />present include: little sunflower, AeliantheZla uniflora; <br />sulfurflower, Eriogon:~m umbeZZatum; and yarrow. <br />1.4 Endangered and Threatened Species <br />~ William S9eber, Curator of the Herbarium, University <br />of Colorado, verified the identity of all vascular plants <br />( collected on the study site and adjacent areas. These <br />,~ plants have been preserved in a reference collection. The <br />majority of plants are identified to the species level. <br />The taxonomic characteristics of many plants had deter- <br />iorated due to the late sampling period, and thus, could be <br />identified only to the genus level. <br />None of the plants identified to species appears on <br />the U.S. Department of Interior's "Endangered and Threatened <br />Species (Plants)"* as published in the Federal Register, <br />* Endangered plants are those species in danger of <br />extinctio:, throughout all or a significant portion <br />of their ranges. Existence may be endangered because <br />of the destruction, drastic modifications, or severe <br />curtailment of habitat, or because of overexploi- <br />- tation, disease, predation, or even unknown reasons. <br />. (continued next page) <br />~ -32- <br />,., <br />