Koford 139 Cynomys ludovicianus June 14, 1955 Devil's Tower, Wyoming Brome heads out earlier on 4 mounds than in areas between mounds. || At 11:40 a.m. surveyed area #1; 29 gram, 18 jivs., largest apparent letter of 4. This jiber closely with previous counts. 15/A + 10 jivs. per A. in round nor., & this near maximal. || At 6. edge relay next to fence & stolbed out approx. 1.7 A. plot (are #2) where little grass saw Cristida, & thick growth falls about 4" high (Grainy submerse & Sphenolike common. Letter has not flowered yet here (but along road under near Nullett). Some witch in flower (purple), a yellow spurge near river (not a dog lawn). || I put in 4 stil posts for 6x6 exposure within center area #2. Some forbs prominent as in area ( A 25% B 25%, other forbs 25%, Cristida 15%, lare & letta 8%, Sphenolena 7%, Ag. smithii trace; these gross estimates foliage). || Astragalus plants about 1 ft. wide persist at edge some used burrows. At 5. fine, several burrows at bare wooden posts. || Stop point density tried but not point diffi- cult to define any single stemmed forb. Loose letter, a point using foliage rather than root crown. || Examined enlargement of aerial aerial photo BBV 32-97, date 8-29-38. This showed old CCC camp W. of colony, & main area of colony settled with burrows. Certainly at least 35 A. in turn at that time, tho not merely extended to SW of the line of trees & shrubs near that end. Hill slope area poor but apparently burrows close to present. NW extremity + on river bench at NE end, where now. So no great change in period of 17 years! June 15, 1955 Put up 6'x6' exposure (of e.l.) with 2' high 20 ga, 1" paulety netting. Location shown on maps. Collected plants on mounds at NE, SW, & NW parts colony. Mostly there similar.