Clover is a type of plant common to the United States, and is also found in virtually every part of the world. Clover (Trifolium), or trefoil, is a genus of about 300 species of plants in the leguminous pea family Fabaceae, clovers share a relatively similar appearance. Most contain three round green leaves, and a small upright flower. In the Eastern United States, this flower is typically white, while Western/Midwest U.S. varieties may be purple, red, or pink, among other colors.
While typical clovers contain three leaves, some contain four. Even rarer than four-leaf clovers are clovers with five, six, or even more leaves. Four-leaf clovers are considered lucky in Folklore.