Broadscale rabbitbrush

Bigelowia graveolens (Nuttall) A. Gray var. latisquamea A. Gray, Proc. Amer. Acad. Arts 8: 645. 1873 (as Bigelovia); Chrysothamnus nauseosus (Pallas ex Pursh) Britton subsp. latisquameus (A. Gray) H. M. Hall & Clements

Plants 130–200 cm. Stems white, leafy, loosely tomentose. Leaves whitish; blades 1-nerved, filiform, 15–45 × 1–2 mm, faces loosely tomentose . Involucres 7.5–10.5 mm . Phyllaries 15–17, apices erect, obtuse, outer abaxial faces densely tomentulose, inner glabrous. Corollas 7–9.5 mm, tubes glabrous or puberulent, lobes 0.6–1 mm, glabrous; style appendages equaling or shorter than stigmatic portions. Cypselae densely hairy; pappi 4.8–7.6 mm. 2n = 18.

Flowering fall. Dry streambeds and arroyos; 1200–2200 m; Ariz., N.Mex.; Mexico (Sonora).