Annuals or perennials, 50–200 cm; taprooted. Stems persistently woolly-tomentose, not glandular. Leaf blades oblong-lanceolate to oblanceolate, mid-cauline 3–7 cm × (3–)6–15(–20) mm, bases clasping to subclasping, not decurrent, margins usually undulate, faces concolor or weakly bicolor, usually woolly-tomentose, sometimes tardily glabrescent adaxially, stipitate-or sessile-glandular beneath tomentum. Heads in corymbiform arrays. Involucres campanulate, 4–4.5 mm. Phyllaries in 5–6 series, usually white, sometimes pink (opaque or hyaline, dull to shiny), ovate to ovate-oblong, glabrous. Pistillate florets 45–90(–110). Bisexual florets (5–)6–12(–18). Cypselae weakly ridged, smooth.
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