Roford 187 Cynomy5 ludovicianus July 17,1955 Devil's Tower, Wyo. foves burrows. In open stand hardwoods in below bedrop in slope near S west colony, some burrows, not currently used, man trace of large trees, & within 1'-3' of trunk bare. Two mean base of 1' diam. ask trees under 10' diam. canopy. Illustrate that next to colony, insufficient sites used for burrows. Not typical be- cause not food? Burrow in rocky red soil; one rock 3"x4"x 1/2". Some yucca leaves cut from several triftle near bur- rows (photod). Wish this stand Andropogon gerardi, many stalks cut. (Business for Anky. scop. on S. slope, much bare ground, but fur falls, fur C.L. burrows). 11 In only extension found, at N W end colony, N of road, max. distance between burrows 35 feet ridge—-and —<N . 112 mode step-point (1" loop) census :- farthest W. of plants in area 40' on each side of farthest burrow, to show kind of ground involved & amt. bare ground. Root crown plants taken. More than 1/2 of loops litter = litter bit, <1/2 loop litter = bare ground. Of 10 plots, 30 bare present ground, 30 litter; grasses, with litter: Ag. am., An. scop. 8, And. gen. 0, Aristida Lo. 0, Stipa co. 0, Bar. grse. 4, Bout. curtup 12, Buchloe low. 1, Unrecognized grasses 3, Yucca, Opuntia poly, art. frij. present. Falso: Carelia, Lygodiemia, Asclepin pumila, Phlox 1, St. Solanua, Origium candense, other false 1; Crest 1. No rock a ground. Ect. 578 S E slope. Red loam soil. Up- hill much Bromus. Plant density index = to 32 only. Grasses 28, Crests, ridges 1, falses 3. 11 NENiobrara Co., Wyoming. 3 mi. 55 w of Mule Creek Junction, noted a Cynomy colony to E. of highway 95. It extended from fence to about 1/4 mile W., & from a bottom S. rip slope about 300 yds. Yellow flotan-