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Plants to 15 dm from a rather long, branched caudex, glabrous except for the usually puberulent infl; lvs basally disposed, the larger ones elongate, oblanceolate to narrowly elliptic, subentire to evidently serrate, tapering to a long petiole with ± sheathing base, the blade and petiole 6–35 cm × 6–60 mm, mostly 6–15 times as long as wide; cauline lvs progressively reduced, not especially numerous; infl much longer than broad, the branches straight and not secund to evidently recurved-secund, but then rather short; invol 3–5 mm, its inner bracts mostly obtuse or rounded, the outer often acute; rays 1–8; achenes glabrous or occasionally hirtellous; 2n=18, 36, the tetraploids more southern or in more calcareous habitats. Bogs and fens; Nf. and Que. to Minn., s. to Md., O., Ind., and in the mts. to N.C. and Tenn. (S. linoides; S. neglecta; S. purshii; S. uniligulata)
