Herbs, 6-15 × 0.3-0.9 dm, grayish. Aerial flowering stems 5-12 dm, disarticulating into ringlike segments 3-10(-16) mm. Leaves: petiole 3-8 cm, pilose; blade oblong-ovate, 2.5-7 × 0.7-2(-3) cm, pilose on both surfaces, margins entire. Inflorescences 1-3 × 2-6 cm; bracts scalelike distally, triangular, and 1-3 mm, semileaflike proximally, oblong, and 3-6 mm. Involucres 2.5-3.5 × 3-5 mm, pilose; teeth 0.5-2 mm. Flowers 1.5-3 mm; tepals: those of outer whorl oblanceolate, 0.9-1.2 mm wide, those of inner whorl broadly oblanceolate to fan-shaped, 1-1.5 mm wide; stamens 0.8-1.5 mm. Achenes 2-2.5 mm. 2n = 40.
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