rabbit-foot clover

or rabbit's-foot clover

[ rab-it-foo t ]
/ ˈræb ɪtˌfʊt /

noun

a plant, Trifolium arvense, having trifoliate leaves with narrow leaflets and fuzzy, cylindrical, grayish-pink flower heads.

Origin of rabbit-foot clover

An Americanism dating back to 1810–20