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The comprehensive plant species list was organized for reporting purposes by morphological class; i.e., <br />annual or perennial graminoids, annual or perennial (orbs, shrubs and subshrubs, trees, succulents, <br />vines and aquatics. Each taxon was further identified by scientific binomial, common name, origin, and <br />habitat occurrence. Taxonomy and nomenclature followed Weber (1987), Hermann (1975), and <br />Hermann (1970). Beetle (1970), Nickerson et al. (1976), and SCS (1979) were consulted in an effort to <br />apply the most widely accepted common names. <br />Floristics - 1999. The original 1987 floristic survey was updated and augmented as species were <br />encountered during sampling and during extensive field reconnaissance of the area. Similarly, care was <br />taken during the floristic surveys to thoroughly search each vegetation type for plant species that are <br />listed or proposed for listing as threatened, endangered, or exemplary in Colorado. Nomencalature for <br />species added to the floristics list is that used by the NRCS PLANTS database of plants in the US. <br />Sample Point Selection - 1987. Individual sample point locations, and line or belt transect origins were <br />selected using pairs of randomly-generated numbers. Pairs of random numbers, treated as Cartesian <br />coordinates, were plotted on x and y axes drawn on the base map until a sufficient number of points were <br />located in each vegetation type to achieve the desired maximum samples sizes required'. Randomly- <br />generated numbers were also used to define the compass direction at which the line or belt transects <br />• would be oriented from the origin. The random numbers generator in aHewlett-Packard 11-C hand-held <br />calculator was used to generate the coordinate pairs and compass bearings. <br />The sample point locations, and line or belt transect origins were located on the ground by pacing the <br />required distances and directions from recognizable landmarks on the base map such as fencelines, <br />corner posts, road intersections, and building corners. Once the vicinity of the sample point was found, a <br />stake was thrown over the observor's shoulder to identify the exact location where the sampling point <br />would be located. <br />Vegetation Cover and Frequency - 1987. Quantitative measurements of vegetation cover and plant <br />species frequency were made in the sagebrush, irrigated pasture and swale/drainage vegetation types. <br />Vegetation cover data was collected in the sagebrush type by the point-intercept technique applied by <br />use of an optical point bar (Mueller-Dombois and Ellenberg 1974; Viert 1985; Buckner 1985). The data <br />was collected on July 9 and 10, 1987. The sampling design consisted of groups of ten points sampled at <br />2m intervals along a 20m transect to achieve 100 points per transect. Thirty transects were sampled. <br />(REVISEDB/15/00) 2.04.10' 13 <br />