Truckee Rabbitbrush

Shrubs, 10–30 cm; with woody, branched caudices, bark becoming dark gray, fibrous with age. Stems ascending, green, sparsely to densely puberulent, sparsely glandular. Leaves ascending to spreading; sessile; blades with faint midnerves and pair of collaterals , narrowly elliptic to oblanceolate, 10–30 × 0.7–1.2 mm, flat to sulcate, apices acute (often apiculate), faces moderately puberulent, sparsely stipitate-glandular. Heads in densely cymiform arrays, often overtopped by distal leaves. Involucres turbinate, 6–10 × 3–4 mm. Phyllaries (12–)14–18 in 3–4 series, ± in vertical ranks, mostly tan, sometimes green-tipped, ovate or oblong to elliptic, unequal, 2.5–7.5 × 1–1.8 mm, chartaceous, outer ± herbaceous wholly or distally, weakly keeled, midveins faint, apices acute to obtuse, faces sparsely puberulent. Disc florets 2–3(–4); corollas 5.5–8 mm, lobes 1–1.7 mm; style branches 2–2.7(–3.4) mm (included in or barely surpassing spreading corolla lobes), appendages 0.8–1.4 mm (lengths about equaling stigmatic portion). Cypselae reddish brown, turbinate, 4–6 mm, densely hairy; pappi tan, 5–7 mm. 2n = 18.

Chrysothamnus viscidiflorus (Hooker) Nuttall subsp. humilis H. M. Hall & Clements

Chrysothamnus humilis, called Truckee rabbitbrush, is a North American species of flowering plants in the tribe Astereae within the family Asteraceae. It has been found in northern California, Oregon, Washington, northern Nevada, southwestern Idaho.

Chrysothamnus humilis is a branching shrub up to 30 cm (12 inches) tall with dark gray bark. It has many small, yellow flower heads clumped into dense arrays. The species grows in sagebrush scrub and in sand in desert regions.