Baccharis pilularis, called coyote brush (or bush), chaparral broom, and bush baccharis, is a shrub in the daisy family native to California, Oregon, Washington, and Baja California. There are reports of isolated populations in New Mexico, most likely introduced.
Shrubs, 15–450 cm (prostrate and mat-forming to erect and rounded, much branched). Stems spreading to ascending, dark brown, shiny, striate-angular, glabrous, often ± scurfy, usually resinous and sticky. Leaves present at flowering; sessile or short-petiolate; blades (1- or 3-nerved) oblanceolate to obovate, the smaller 5–40 × 2–15 mm (thick), bases cuneate, margins entire or coarsely dentate (teeth 3–9 distal to middles), faces glabrous, gland-dotted, resinous. Heads (100–200+) in (leafy) paniculiform arrays. Involucres hemispheric to campanulate; staminate 3.2–5 mm, pistillate 3–6 mm. Phyllaries ovate to lanceolate, 1–3 mm, margins yellowish, scarious, medians yellow proximally, green distally, apices obtuse to acute or acuminate (erose, abaxial faces papillose-scurfy). Staminate florets 20–34, 3–4 mm. Pistillate florets 19–43; corollas 2.5–3.5 mm. Cypselae 1–2 mm, 8–10-nerved, glabrous; pappi 6–9 mm.