Herbs, erect, 1-8 dm, tomentose, greenish gray to gray. Stems: aerial flowering stems erect, 0.5-1(-1.5) dm, tomentose. Leaves basal and subbasal, rarely cauline; petiole 2-5 cm, tomentose; basal blade initially suborbiculate, then elliptic, 1.5-4 × 1-1.5 cm, rarely suborbiculate and 2-4 × 2-4 cm when first formed, densely tomentose on both surfaces, or slightly less so and grayish to greenish abaxially; cauline blade similar to basal but not suborbiculate. Inflorescences cymose, open, 8-70 × 10-50 cm; bracts 1-2.5 × 1-2 mm. Peduncles erect, straight, slender, 1-4 cm, tomentose. Involucres terminal at tips of slender branchlets proximally, not appressed to branches, turbinate, 2-2.5 × 1.5-2 mm, tomentose; teeth 5, erect, 0.5-0.8 mm. Flowers 1.5-2.5 mm; perianth white, glabrous; tepals monomorphic, oblong; stamens included, 1-1.5 mm; filaments usually pilose proximally; styles 0.2-1 mm. Achenes light brown, 3-gonous, 2-2.8 mm; beak granular. 2n = 34.
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