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3 <br />• scooulorum). Gambel oak (Quercus gambelii) was a major shrub species, <br />occurring with mountain mahogany (Cercocarpus montanus) and snowberry <br />(Symphoricarpos oreophilus). Numerous annual and perennial forbs and <br />grasses occurred as understory vegetation, including cinquefoil <br />(Potentilla concinna), Carey. spp. side -oats grama (Bouteloua <br />curtipendula), and June -grass (Y.oeleria cristata). The soils occur- <br />ring in this type were a light brown sandy loam. Ponderosa pine, <br />Douglas fir and Gambel oak were showing good reproduction. Understory <br />was sparse under the older conifers where there was dense litter. <br />The Ponderosa pine -oak vegetation type occurred on a north - <br />facing slope of about 270 with an elevation of 7500 ft. It was charac- <br />terized by pure stands of Ponderosa pine (Pinus ponderosa) interspersed <br />with patches of Gambel oak (Quercus gambelii). Other overstory spe- <br />• cies were pinyon pine (Pinus edulis) and Rocky Mountain juniper <br />(Juniperus scopulorum). Other shrub species were snowberry <br />(Symphoricarpos oreophilus) and mountain mahogany (Cercocarpus <br />montanus). Understory species consisted of annual and perennial <br />forbs and grasses such as Carex sp., Parry oatgrass (Danthonia arryi), <br />side -oats grama (Bouteloua curtipendula), blue grama (Bouteloua <br />gracilis), cinquefoil (Potentilla concinna), star gentian (Swertia <br />radiata), and Fendler.meadowrue (Thalictrum fendleri). Openings in <br />the tree canopy were dominated by Gambel oak and occasional stands <br />of mountain mahogany. Parry oatgrass formed tussocks in the openings. <br />The soil was a light brown sandy loam. <br />The willow carr vegetation type was located in a drainage of <br />the Purgatoire River at an elevation of approximately 7400 ft. The <br />• dominant shrubs were narrowleaf willow (Salix exi ua) and floods rose <br />