Oxalis species
Description: Wood sorrel resembles shamrock or four-leaf clover, with a bell-shaped pink, yellow, or white flower.
Habitat and Distribution: Wood sorrel is found in Temperate Zones worldwide, in lawns, open areas, and sunny woods.
Edible Parts: Cook the entire plant.
CAUTION
Eat only small amounts of this plant as it contains a fairly high concentration of oxalic acid that can be harmful.