Brewer's Fleabane

Erigeron breweri is treated as a member of E. sect. Linearifolii in G. L. Nesom (1992b), where all of the varieties are mapped in detail.

Perennials, 7–75 cm; taprooted (taproots usually not collected, often weakly developed), roots and caudices woody, branches rhizomelike (3–15 cm; fibrous-rooted), relatively slender, leafless, ascending. Stems usually ascending, sometimes prostrate to procumbent or decumbent (var. jacinteus) (often purple, distal branches stiff, spreading-ascending), hispid (hairs spreading-deflexed, 0.1–0.4 mm), mostly eglandular. Leaves cauline; (ascending) blades narrowly oblong-lanceolate to narrowly obovate, 10–40 × 2–5 mm, margins entire, relatively evenly spaced and sized, hispid, mostly eglandular. Heads 1 or 2–5(–10) in loosely corymbiform arrays. Involucres mostly 4–6 × 9–14 mm. Phyllaries in 3–5 series (all but outermost with stramineous margins and distal, greenish-herbaceous, narrowly rhomboid areas), strigoso- to hispido-hirsute or essentially glabrous, densely minutely glandular. Ray florets 20–62; corollas white or pink, often drying blue, 4–7 mm, laminae weakly coiling. Disc corollas 3.5–5.5 mm (throats slightly indurate, not inflated). Cypselae 2–3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of (15–)20–35(–50) bristles.

Erigeron breweri is a North American species of flowering plants in the family Asteraceae known by the common name Brewer's fleabane.

Erigeron breweri is native to the western United States in the states of California and Nevada, where it grows in many varied habitats, from mountains to grassland and desert. It is a perennial herb reaching anywhere from 10 to 70 centimeters (4-28 inches) in height with evenly spaced small leaves along its hairy stems. The flower heads are around one centimeter (0.4 inches) wide with centers of golden yellow or greenish disc florets and most heads have a fringe of purple ray florets.

Varieties Erigeron breweri var. bisanctus G.Nesom - San Gabriel + San Bernardino Mountains Erigeron breweri var. breweri - Nevada, mountains of California (primarily Sierra Nevada) from Shasta County to San Bernardino County Erigeron breweri var. covillei (Greene) G.L.Nesom - southern California from Inyo County to San Diego County Erigeron breweri var. jacinteus (H.M.Hall) Cronquist - southern California from Kern County to Riverside County Erigeron breweri var. porphyreticus (M.E.Jones) Cronquist mountains of California from Alpine County to Riverside County