Annuals, to 40 cm (herbage sweetly scented). Stems erect, branched distally, usually glandular-puberulent (often with longer non-glandular hairs as well). Leaves linear, 15–60 × 0.5–5 mm, (not fleshy) margins entire or 1–2-pinnately lobed, faces hairy. Involucres hemispheric to obconic, 4–7 mm. Phyllaries 6–14, lanceolate to ovate, hairy. Receptacles conic, smooth, muricate, or pitted, hairy. Ray florets 6–15; (corollas yellow) laminae linear-oblong or oblong, 3–10 mm. Anther appendages elliptic, acute (style apices ± deltate with apical tufts of hairs and subapical fringes of shorter hairs). Cypselae black, linear to narrowly clavate, to 2.5 mm, hairy; pappi usually of 5–6+ lanceolate to ovate scales (1–5 uniaristate), sometimes of 4–5 subulate, aristate scales, or 0. 2n = 8, 10.
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