2c. Boltonia asteroides (Linnaeus) L’Héritier var. recognita (Fernald & Griscom) Cronquist, Bull. Torrey Bot. Club. 74: 149. 1947.
Boltonia latisquama A. Gray var. recognita Fernald & Griscom, Rhodora 42: 491, plate 646. 1940; B. latisquama var. microcephala Fernald & Griscom; B. latisquama var. occidentalis A. Gray; B. recognita (Fernald & Griscom) G. N. Jones
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.
