Herbs, erect, not scapose, 4-8(-15) × 1-4 dm, glabrous or villous. Stems erect, without persistent leaf bases, up to 5 height of plant; caudex stems absent; aerial flowering stems erect, slender to stout, solid or hollow, infrequently fistulose, 1.5-4(-8) dm, glabrous, tomen-tose, or villous. Leaves basal; petiole 5-25 cm, villous; blade lanceolate to lance-ovate, 4-15(-25) × 1.5-6 cm, loosely villous and green on both surfaces or infrequently thinly tomentose abaxially and glabrate adaxially, margins plane. Inflorescences cymose, 15-50 × 10-30 cm; branches glabrous or villous; bracts 3, semileaflike, linear, and 5-30 × 2-5 mm proximally, scalelike, triangular, and 1-4 mm distally. Peduncles absent or slender, erect, 0.5-4 cm, glabrous or tomentose. Involucres 1 per node or 2-5 per cluster, turbinate, (2.5-)3-4 × 2.5-3 mm, glabrous or slightly tomentose; teeth 5, erect, 0.4-0.9 mm. Flowers 2.5-4 mm, glabrous; perianth white; tepals connate proximal 1/ 4, monomorphic, obovate; stamens exserted, 2.5-4 mm; filaments pilose proximally. Achenes light brown, 3.5-4 mm, glabrous.
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