Shamrock

A trifoliate plant used as a national emblem by the Irish. The legend is that St. Patrick once plucked a leaf of it for use in illustrating the doctrine of the trinity.

clover native to Ireland with yellowish flowers; often considered the true or original shamrock

creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage

Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers