Heads 15-60(-80); bracts linear-oblanceolate to narrowly oblanceolate or elliptic, 20-120 × 3-18 mm. Involucres 3-5 × 6-9 mm. Phyllaries oblanceolate to linear-oblanceolate, subequal, membranous margins ± narrow, 1-2.5(-3) mm wide, apices cuspidate; outer 1.5-3 × 0.4-1.5 mm, inner 2.1-4 × 0.5-1.5 mm. Cypselae obovoid, winged; pappus awns 0.6-1.4 mm, lengths 2 / 3 + cypselae. 2n = 36. Flowering Aug-Sep. Wet prairies, riverbanks, sloughs; 10-500 m; Man., Sask.; Ark., Conn., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Mass., Mich., Minn., Mo., Nebr., N.J., N.Y., N.Dak., Ohio, Okla., Oreg., R.I., S.Dak., Tenn., Wis.
From Flora of Indiana (1940) by Charles C. Deam
Infrequent in moist soil in prairie habitats along roadsides and streams and about lakes, ponds, and sloughs. Rare or absent from the eastern part of the state.
