This alien weed is widespread in eastern states and more scattered in the west (FNA 25). It is especially common in mowed lawns, and more typical of damper sites than sanguinalis. The earliest report from Ky. was under the old synonym D. glabra Beauv., by Short & Peter (1835). Variation in this species needs further review. Although not recognized by J.K. Wipff (FNA 25), var. mississippiensis (Gattinger) Fern. was previously considered to be a robust native variant in the eastern U.S.A., especially southern regions (F). Colls. from HARD (Medley et al. 19778-92 for WKY) and probably elsewhere do fit the description of var. mississippiensis.