Nouns

(n)white clover, dutch clover, shamrock, Trifolium repenscreeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage
(n)common wood sorrel, cuckoo bread, shamrock, Oxalis acetosellaEurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers
(n)hop clover, shamrock, lesser yellow trefoil, Trifolium dubiumclover native to Ireland with yellowish flowers; often considered the true or original shamrock