Annuals (fragrant), 15–60 cm; taprooted or fibrous-rooted. Stems glandular-puberulent (without persistent tomentum, stipitate glands 0.1–0.2 mm, stalks narrower than gland widths. Leaf blades linear to linear-lanceolate or linear-oblanceolate, 1.5–5.5 cm × 1.5–10 mm, bases not clasping, not decurrent, margins flat, faces bicolor, abaxial white to gray, tomentose, adaxial green, both minutely stipitate-glandular. Heads in corymbiform arrays. Involucres turbinate-campanulate, 5–6 mm. Phyllaries in 4–6 series, white to tawny white (hyaline, shiny), narrowly ovate to oblong, glabrous. Pistillate florets 47–78. Bisexual florets (7–)11–20. Cypselae ridged, smooth.
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