lappa clover
noun
: a Eurasian clover (Trifolium lappaceum) with lavender-rose colored flowers that is grown as a forage and hay crop in some parts of the U.S.
Word History
Etymology
lappa probably modification of New Latin lappaceum (specific epithet of Trifolium lappaceum), from Latin, neuter of lappaceus burrlike, from lappa burr + -aceus -aceous