Herbs, erect, (0.5-)1-4(-5) dm, tomentose, greenish gray to gray. Stems: aerial flowering stems erect, 0.5-1 dm, tomentose. Leaves basal and cauline; basal: petiole 1-4 cm, thinly tomentose, blade narrowly oblong to obovate, (1-)2-4(-5) × 1-2(-3) cm, thinly tomentose and greenish abaxially, floccose to glabrate and greenish adaxially; cauline: petiole 0.5-2 cm, thinly tomentose, blade elliptic or rarely ovate, (0.7-)1-3(-4.5) ×0.5-1.5(-3.5) cm, similar to basal blade. Inflorescences cymose, somewhat diffuse, 10-40(-45) × 5-30 cm; branches tomentose; bracts 2-4 × 0.5-1.5 mm. Peduncles erect, straight, slender, 0.5-4(-6) cm, tomentose. Involucres terminal at tips of slender branchlets proximally, not appressed to branches, narrowly campanulate, (1.5-)1.8-2 × 1.5-2(-2.2) mm, tomentose; teeth 5, erect, 0.3-0.5 mm. Flowers 1.5-2(-2.5) mm; perianth white, glabrous but conspicuously pustulose; tepals monomorphic, narrowly elliptic to oblong; stamens included, 1-1.5 mm; filaments pilose proximally; styles 0.7-1 mm. Achenes brown, 3-gonous, 2-2.5 mm; beak papillose. 2n = 34.
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