This common stoloniferous forage ("white clover") has been present in Ky. since early after settlement. Counties reported by Vincent (2001) are provisionally included (as for other Trifolium spp.), but his collection data need to be checked. T. repens is highly variable; 2n = 16, 28, 32 or (?) 64 versus just 16 in other Lotoidea here. The large form known as "Ladino Clover" (forma giganteum Lagr.-Foss) is widely sown, and often appears quite distinct from typical plants. Although pastures are often "improved" with fresh sowings, regular mowing or grazing will generally promote the species, and after unusually snowy winters it becomes especially vigorous, as in 2010. The distinctly V-shaped blackish marks on leaflets of repens appear to have a genetic basis, and there is some evidence that grazing by sheep can select for more pronounced marks (Cahn & Harper 1976).