Clover

Clovers are small clusters of three-leaved plants used as scenery in both Pikmin 1 and Pikmin 2. Although they do not directly affect gameplay, disturbing a clover patch can often scare Iridescent Flint Beetles out of hiding. Clovers can be seen in numerous overworld locations, but are particularly common on "rest levels" inside several caves.

This should not be confused with the Science Project, a treasure that is a single four-leaved clover.

Pikmin:Redemption
There cousins, the Red Clover, can poison Captains and non-White Pikmin, resulting in a small amount of damage for Captains and poison-induced panic for Pikmin.