Roford 138 Cynomys ludovicianus June 15/14, 1955. Devil's Tower, Wyoming. With George A. Dickson, S.C.S., Nulettgways, looked over colony vegetation. Unfortunately he knew little of plant identification or indicator. He said that colony area would be closed poor because all gone to weeds. I got range condition class sheet for this area from him. In some parts colony, such as W. corner W. of road, much Bromus tectorum about 8" tall. Near old wounds this taller & headed out conspicuously more than a surrounding area, a little Agro. smithii where Bromus thile. Possibly C.L. keeps Ag. am. down so Bromus incanescens, or area denuded & Bromus invader before Ag. am./On hillslope work area, Andropogon scoparum, some Calamovilfa, & no C.L., the much bare ground between tufts & soil not especially rocky-unstable at some seasons? This is red-bred soil which erodes easily. Most said a colony pithy-loam, judged Dickson. Near ruin lumens in fine sand, which would seem to cover in in lumens if dry!! In slightly low areas in colony, Artemisia cana (?) about 4" high is dominant plant over hundreds square feet. Many stolons of this cut & left, apparently by C.L. Certainly they keep this brush low although may not be able to eliminate it once of bush size. No other shrubs noted in main C.L. area. || A band of sod, oak, & shrubs near SW edge colony. Where is this band, 10 yds. wide of shode some C.L. lumens, not much weed now. One at base 14" ask; two were 1' from base others, all in shode, in a narrow strip. In shode lumen oaks just SW of colony, other old lumens. Apparently at periphery unfavorable sites used for lumens. This might lead to penetration barriers & crossing of wooded ditcher, step benches, etc., & allow quick reinvivion such areas in times population pressure or favorable conditions.