Buttonweed
Diodia virginiana (dy-OH-dee-uh vir-jin-ee-AN-uh)
Virginia buttonweed, is a native, warm-season, mat-forming, herbaceous perennial, broadleaf weed with a spreading, prostrate habit and small white star-shaped flowers. It can be found in swamps, wet meadows, marshes, coastal prairies, and in the mud along streams and ponds. It is considered a weed and can be troublesome in lawns and other disturbed areas of the South; however, it is listed as rare farther north in New Jersey and Indiana. This plant is quite widespread in North Carolina, but typically not found in the northern mountains. It is a member of the madder or coffee family (Rubiaceae). The genus name, Diodia , is from the Greek words: diodos , meaning "thoroughfare." This references this plant's natural habitat. The specific epithet, virginiana, is Latin, meaning "of Virginia." This weed adapts well to a range of soil types, but prefers moist to wet soil and thrives in full to partial sun. Propagated by seeds, it may also spread through stem fragments. Virginia buttonweed forms a dense mat near the ground and has deep roots and rhizomes. Its leaves are simple, green, oppositely arranged, lanceolate, sessile with sheathing stipules. The flowers are small, white, tubular, 4-lobed, and bloom during the summer and fall. Its fruit is a small, oval nutlet. Bees are attracted to this plant. As the Virginia buttonweed decomposes, it serves as a food source for aquatic life. This plant is not recommended for the home landscape due to its spreading nature and its tendency to crowd out other plants. It is also the host of the flea beetle, which can also damage your lawn and garden. Maintaining a healthy lawn will help prevent or reduce the presence of this weed. In some cases, an herbicide application may be necessary for weed control. Weed management should start in early spring as the plant begins to emerge. Diseases, Insects, and Other Plant Problems: Control of Virginia buttonweed can be difficult in an established lawn. Its extensive root system and ease of reproduction can make it hard to eradicate.
Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 57 attributes.