Mature plant is well branched, and forms a mat on the soil surface that may reach a diameter of 20 inches. In landscape plantings the stems may twine up and over the tops of other plants. Seeds germinate in late spring and the plant matures in late summer.
Commonly infests landscaped areas, gardens, low groundcovers, lawns, orchards and vineyards, but less of a problem in cultivated annual crops. Prefers moist, exposed, disturbed wetland margins and roadsides. Germinates later than most other weeds, and this along with its low growth habit may allow it to be missed in control programs.