Annuals, 9–100 cm. Stems ± solid or fistulose. Leaves: proximal blades pinnatifid to toothed, faces ± hirsute and sometimes sparsely stipitate-glandular as well. Heads in crowded to open, corymbiform or paniculiform arrays. Bracts subtending heads sometimes overlapping proximal 0–1/2 of each involucre. Phyllaries ± evenly and minutely stipitate-glandular, including margins and apices, with non-glandular, non-pustule-based hairs as well. Paleae in 1 series. Ray florets (7–)8–12; laminae pale yellow, 6–12 mm. Disc florets 10–21, all or mostly functionally staminate; anthers yellow or brownish. Pappi usually of 4–9 linear or oblong scales 0.8–1.1 mm, or of 1–5 subulate to setiform scales 0.1–0.9 mm, rarely 0. 2n = 18.
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