Photo: Rebekah D. Wallace, University of Georgia, Bugwood.org carpetweed Mollugo verticillata
Foliage is narrow with rounded tips and can be a bit wider in the middle of the leaf blade; they are much narrower at the base. Leaves are whorled around the stem with 3-8 per node. Flowers are produced during the summer, primarily July through September. They are small (only 4-5mm across) and white.
Since carpetweed is an annual, all reproduction is through seeds. This plant can be a weed issue in ornamental plant beds and in newly established or thinning turf. There are other low growing weeds that can be found in these locations, but there are easy ways to tell them apart. Chickweeds and speedwells are low growers, but lack the whorled leaves and forked branching of stems. Bedstraw has whorled leaves, but has square stems and in the case of catchweed bedstraw, small hairs on stems and foliage.
Carpetweed has a shallow taproot and is easy to hand pull. The proper use of mulch in ornamental plant areas also can effectively reduce this weed. If these are not an option, there are a number of herbicide options.
Remember to always read the label for proper application sites and rates.