A low-growing summer weed that moves into thin, dry, or compacted lawn areas.

Grows as a flat mat close to the ground with reddish, hairy stems. If you break a stem, it oozes a milky sap. Leaves are paired opposite each other and often have a small purple blotch in the middle.
Often mistaken for: Prostrate knotweed (no milky sap, alternate leaves, no purple blotch)
Shows up during the summer months, roughly June through September, and keeps sprouting new plants over an extended stretch of the season.
Common in home lawns, especially thin, dry, or compacted spots, and can also pop up in landscape beds.

A fast-spreading summer weed that forms thick mats in thin or bare lawn spots.

A creeping perennial grass that invades lawns and stands out when it turns brown while your turf stays green.

An upright summer spurge with reddish stems and milky sap that pops up in thin lawns, beds and sidewalk cracks.

A coarse, spreading perennial grass that sticks out in home lawns and is tough to get rid of once established.