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21m. Ericameria nauseosa (Pallas ex Pursh) G. L. Nesom & G. I. Baird var. nauseosa
Rubber rabbitbrush
Plants mostly 20–60 cm . Stems grayish to white, leafy, loosely tomentose . Leaves grayish green to white; blades 1-nerved, narrowly linear, 10–50 × 1–1.5 mm, faces loosely tomentose. Involucres 7–10.5 mm. Phyllaries 10–18, apices erect, mostly obtuse, abaxial faces tomentose, sometimes sparingly. Corollas 6.5–9 mm, tubes usually puberulent, rarely arachnose, lobes 1–2 mm, glabrous; style appendages longer than stigmatic portions. Cypselae densely hairy; pappi 5.2–7.2 mm. 2n = 18.
Flowering late summer–fall. Plains and hills, often in barren alkaline soils; 300–2000 m; Alta., Sask.; Colo., Idaho, Mont., Nebr., N.Dak., S.Dak., Wyo.
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