This native perennial is also called True Wood Sorrel, Shamrock, Sleeping Beauty, Sour Trefoil, Sour Grass, and Hearts. It is a member of the Wood Sorrel family.

From May to June in the Algonquin Highlands, you may find this delicate white blossom with deep pink veins blooming in moist and shady wooded areas. The bell-shaped flower has 5 petals, 10 stamens and an erect, pencil-like pistil. It grows on a stem, that may be  up to 10 cm tall. It has basal clover-like leaves only, that alternate and are pale green. Its leaves often cause this plant to be mistaken for clover. It has a scaly, creeping rootstock.

At night, not only do Wood Sorrel flowers close but the leaves also fold up, rather like a fan. Its fruit is an elongated capsule that may open suddenly expelling its seeds for some distance.