Perennials (perhaps flowering first year), 15–70 cm (glabrate). Stems erect or decumbent. Leaves sessile; blades linear, 5–12 cm × 2–8 mm, bases barely connate, margins entire or weakly serrate. Heads 20–100+, in ± open, paniculiform-corymbiform arrays. Calyculi of 1–2 linear bractlets 1–2.5 mm. Involucres oblong-angular, 4–5 mm. Phyllaries 5–6, boat-shaped (phyllaries enclosing ray florets conspicuously keeled). Ray florets 0 or 1; laminae yellow, oblong-elliptic, 2 mm. Disc florets (5–)7–10; corolla tubes 0.8–1.2 mm, throats funnelform, 1.2–1.5 mm (distal 1/2 expanded). Cypselae linear, 1.5–2 mm (those of rays longer); pappi 0. 2n = 36.
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