Ground Ivy (Glechoma hederacea):  Leaves are almost round to kidney shaped, borne on long petioles.  The edges are round toothed and the veins are prominent.  The diameter of the leaves is 1/2 to 1 1/2 inches.  The leaves are dotted with small glands containing volatile oil making them aromatic when crushed.  This is common of plants in the mint family (labiatae).