A close look at the flowers reveals why it is called Fringecup, the flowers have a top-shaped calyx with white to pink finely divided petals making a folded-back fringe around the edge.
The leaves are roughly heart-shaped and form an evergreen basal clump in milder climates.
The plant is tolerant of wet soil and seasonal flooding, and likes to grow on streambanks and in ditches, so is useful in shady areas with poor drainage. It is somewhat drought tolerant, but likes soil with humus.
It can be used in a border, where the 2' tall flower spikes can attract hummingbirds. It likes some shade and doesn't like full sun. It starts blooming in mid April, and the flowers eventually turn brown, at which time the stalks can be removed. Seed should be sown immediately when ripe.
It is supposed to be fragrant, but I haven't noticed a scent. This is a cute and useful native plant, adaptable to gardens. In the right conditions it can form large colonies.