Aegopodium podagraria

Goutweed, also known as bishop's-weed and snow-on-the-mountain, is an herbaceous perennial plant native to Europe and Asia. Most leaves are basal, with the leafstalk attached to an underground stem, or rhizome. The leaves are divided into three groups of three leaflets;  the leaflets are toothed and sometimes irregularly lobed. A variegated form is commonly seen as groundcover. This was a favorite ornamental during the 1800s, and is a common garden weed.