Koford 157. Cynomy s ludovicianus June 25, 1955 Nr. Ft. Collins, Colo. On this S. facing slope much Iva axillaris cut, out of all proportion to amt. present. In bottom many needles of Distichlis stricta cut & left lying, Some Danum & Salsolea cut & left lying. Light horse grazing this pasture, 4 perhaps horses eat Salsolea, but cut off stalk usually left on ground. Salsolea cut 1 to 3" high, at angle; not obviously nibbled by rodents (some horse, some c. l.? ). At moisture many burrow purple-flowered Solanum persiste, & some Salsolea too. // In second plot to S. of fence, on W. slope, Ag. sm. sparse but widespread, & many culms piled some later. Iva stolon stolons cut at 1 to 3" height, so many as 15/sg. ft. 10" tall Euphalia (marginata ? ). Some Dyspodia present. Moro- Lepia or a near mouse. Small potater Bucklees present, heavily grazed, stolons prominent. Soil a clay loam. Some Burt. grac. present; seed stolons to 4" tall, with heads. Many dry culms of Ag. sm. on ground. Mr. W. and Chryothamnus well cut with cut- tings left. Not put in adjacent area to C.E., where no C. l., nor Sal- sola (20 c. l. rather than horses ? ). To W. where no C. l., Burt. grac. seed stolons 1' tall & always Ag. sm. large, burnt Chryothamnus 4' tall, Salsolea 10"; uncut, Found shell of lady C. l. on mound. Much 1½' tall Panicum cut at 2"-6"; prob- ably by C. l. (CPER, Weld G., Colo.) June 26, 1955 Visited CPER S. W. 22 colony. Green now, espe- cially because of Salsolea. Opuntia (yellow pear, pink barrel), Lopsele, Oenothera, Euphorbia, in bloom; lession Buckles & Burt. grac.. Many jews. now present. At least 20 new burrows in area N. of creek (60%) lined at W. end colony, invading 4±7° S. slope where much bare ground, Mull. ton., Salsolea, Chrysopodium. I staked all new burrows