Packera aurea 
Previously named Senecio aureus is commonly referred to as golden groundsel. This spunky little plant has low growing heart-shaped leaves and sends up a spike of bright yellow, daisy-like flowers that will brighten up any landscape.
 
If allowed to colonize, this plant can serve as a suitable ground cover for areas that receive sun to full shade and regular moisture. Excellent for a woodland garden.
 
Source: grown from seed originally from Minnesota. Prairie Moon Nursery.