Vulcan rabbitbrush

Chrysothamnus vulcanicus Greene, Leafl. Bot. Observ. Crit. 1: 80. 1904; C. parryi (A. Gray) Greene subsp. vulcanicus (Greene) H. M. Hall & Clements

Plants 10–20 cm (branches slender). Leaves moderately crowded, green; blades 1(–3)-nerved, linear, 30–50 × 0.5–2 mm, faces glabrous, minutely gland-dotted; distalmost about equaling arrays. Heads 6–20+ in lax (much-branched), racemiform to thyrsiform arrays. Involucres 12.5–15 mm. Phyllaries 9–13, chartaceous, apices erect (tan or greenish), attenuate. Florets 5–7; corollas yellow, 9–11 mm, tubes glabrous or proximally puberulent, throats gradually dilated, lobes 1.5–1.9 mm. 2n = 18.

Flowering late summer–fall. Sandy soils, rocky slopes and sagebrush flats; 1400–3200 m; Calif.

Variety vulcanica grows in the southern Sierra Nevada.