Black medic is another creeping weed that you'll want to banish ... Creeping Charlie has small, scalloped leaves with blue or purplish flowers that appear in the spring and summer.

Don't let the delicate purplish-blue ... creeping Charlie (Glechoma hederacea) is a tough perennial spreader that can quickly dominate your yard if you let it. Native to Europe, this pesky weed ...

So the small blue flowers and the resulting heart-shaped fruits simply grow at the base of leaves in Field speedwell. Turf speedwell has no hairs on its leaves, and the flowers are mainly white.