Perennials, rarely biennials; inner cypselae with beaks ca. 1 mm. 2n = 8. Flowering May-Nov. Lawns, waste areas, dunes, grassy areas; 100-1000 m; introduced; B.C.; Ala., Ariz., Calif., Conn., Ill., Ind., Md., Mass., Mich., Mo., Nev., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., Tenn., Tex., Vt., Va., Wash., Wis.; Europe.

Indiana Coefficient of Conservatism: C =

Wetland Indicator Status: