Koford 192 Synomys ludovicianus August 29, 1955 Nr. Cache, Oklahoma warm Aristida (Bda & Asa mixed), then nearly pure Asa. Some shelter nearer a few feet wide bare Bda bottom, Asa litterum. Vicinity close to ridge are Dol. rostris and Cirsium 1. tall. Patchy Asa several feet across in area Bda-Aristida. Then abruptly solid Asa on upslope side; now burrows in this but some where near pure, covering nearly all ground, 3-8" tall. About 10 yds. in from edge Aristida, 2 new burrows about 6" deep where Asa 4-10" tall. Some burrows in Asa area are in patches several sq. feet of Bda (- cause, or effect ?). Two burrows present but not current use, 70+100 yds. from edge continuous Bda-Aristida, where Andropogon-Ben taller 3-12" tall in gull. Thought Androp. are areas of shelter cut Androp.; they may be favored by C.L. (or caused by them). Some And. grandis & And. scop., and some Branner, on this slope above C.L. level (dregs not above 5-40 feet). I photog. at burrow 50' out into Asa-Bda. At mouth burrow cut 2 culms Age, 5" long, as I watched. Seems to feed mainly on dry seeds a far as ground. Burrows to within 30' of fence to NE, but now at a beyond fence (less Bda & grazing there, but rather open & muddy). This group does not cross fence at NE corner; to W. of fence their stand of Andropogon (due to no microzoon ?). More to S. crosses fence to E., & much Aristida prominent there (probably due to C.L. rather than heavy grazing, as grazing light there.) || East Area . Light grazing. About 80 yds. SE of fence near center in amended area 70' drain, of Bda & Aristida, surrounded by Andropogon. In center 10' wide mound with 2 burrows (much Amm. blit. on). In one line from there, then nearly pure Aristida for 2-30', then mixed with Bda; then Asa in spots & increasing, becoming pure 15' from burrow; then Age starts about 30' from burrow. When C.L., <5% forb, but some forb in taller grasser.(C.L. are - Lepidium, Androsci, Eric.)