Two clovers native to Kentucky, buffalo clover (Trifolium reflexum) and running buffalo clover (T. stoloniferum) recently have been re-discovered. These clovers were common in Kentucky until about 1850. Their names are derived from the fact that they occurred mostly along buffalo trails through woods. Historical records indicate that buffalo clover occurred on drier and less fertile soils of the former Big Barren Region and the Shawnee Hills, whereas running buffalo clover was widespread on moist, fertile soils in the Bluegrass Region. Both are now extremely rare in Kentucky. At present buffalo clover has been found in Mammoth Cave National Park, and running buffalo clover in Boone, Bourbon and Fayette Counties. Running buffalo clover has been designated as a federally endangered species.
Taylor, Norman L. and Campbell, J. N. N., "Buffalo Clover" (1989). Agriculture and Natural Resources Publications. 55.