Plants 7-10+ dm. Stems tomentose to pannose. Leaves mostly cauline; blades linear, 5-9(-12+) cm × 3-5(-8+) mm, l/w = 16-32, abaxially tomentose, adaxially densely sericeo-tomentose. Heads in corymbiform arrays. Peduncles 10-60 mm. Involucres ± hemispheric, 8-12 × 7-12 mm. Phyllaries 50-60+ in 5-6+ series, sericeo-tomentose to pannose, including margins, the outer lance-deltate, 1-3 mm, the inner lanceolate, 7-11+ mm, tips acute. Florets 40-50+. Cypselae 3.5-4+ mm; pappi stramineous, outer subulate scales or bristles 20+, 0.6-1.5+ mm, intergrading with 30+, 6-7+ mm inner subulate scales or bristles. 2n = 34.

Flowering Jun. Arroyos, on limestone; 800-900 m; Tex.; Mexico (Coahuila).