Ground ivy (Glechoma hederacea), also known as creeping charlie, is a common weed in many lawns. Ground ivy is a low-growing, creeping, invasive perennial. It spreads by seed and the vining stems (stolons) which root at their nodes. The leaves of ground ivy are round or kidney-shaped with scalloped margins. Stems are four-sided. Flowers are small, bluish purple, and funnel-shaped.  Ground ivy thrives in damp, shady areas, but also grows well in sunny locations. A member of the mint family, ground ivy produces a minty odor when cut or crushed.