Nevada rock daisy

Laphamia megalocephala S. Watson, Amer. Naturalist 7: 301. 1873

Perennials or subshrubs, 15–55 cm (often dense, profusely branched clumps, sparsely leafy); densely hirtellous. Leaves: petioles 1–6 mm; blades usually elliptic, lanceolate, lance-ovate, ovate, or suborbiculate, sometimes linear, 4–8(–15) × 1–10(–12) mm, margins entire, irregularly and sparsely serrate, or serrate-lobed. Heads borne singly or (2–3) in loose, corymbiform arrays, 6–9(–10) × 5–6(–8) mm. Peduncles 10–45(–80) mm. Involucres campanulate. Phyllaries 14–20, lanceolate to suboblanceolate, 5–6 × 1.3–1.9 mm. Ray florets 0. Disc florets 45–60; corollas yellow, tubes 1–1.6 mm, throats tubular to subfunnelform, 1.6–2.2 mm, lobes 0.4–0.7 mm. Cypselae narrowly oblanceolate to suboblanceolate, 2.5–3 mm, margins thin-calloused, short-hairy; pappi 0, or of single bristles.

Varieties 2 (2 in the flora): w United States.