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Stems often densely hairy (hairs whitish, pustule-based, antrorse-appresssed, stiff). Leaf blades 2–5 cm, margins toothed mostly distally, apices acute. Peduncles 3–10 cm. Ray laminae rotundly elliptic, 5–15 mm. Disc corollas usually yellow with reddish veins (sometimes purple).
Flowering late summer–winter. Disturbed sites, caliche, limestone, and sandy soils; 0–300 m; Tex.; Mexico; Central America (Guatemala).