Engelmann daisy, cutleaf daisy

Silphium peristenium Rafinesque, Atlantic J. 1: 146. 1832; Engelmannia pinnatifida Nuttall

Basal leaves (5–)10–30 cm. Cauline leaves gradually smaller distally, primary lobes ovate to narrowly linear, their margins sometimes again lobed or toothed. Involucres 6–10 mm. Phyllary tips hirsute-ciliate. Ray corollas 10–16 mm. Disc corollas 3.5–5 mm. Cypselae 3–4 mm; pappi 1–2 mm. 2n = 18.

Flowering Apr–Jul. Grasslands, pinyon-juniper woodlands, desert scrub, roadsides; 100–2000 m; Ariz., Ark., Colo., Kans., Mo., Nebr., N.Mex., Okla., S.Dak., Tex.; Mexico (Chihuahua, Coahuila, Nuevo León, Tamaulipas).