57. Erigeron linearis (Hooker) Piper, Contr. U.S. Natl. Herb. 11: 567. 1906.
Desert yellow fleabane
Diplopappus linearis Hooker, Fl. Bor.-Amer. 2: 21. 1834; Erigeron peucephyllus A. Gray
Perennials, 5–15(–20) cm; taprooted, caudices branched, woody. Stems erect to slightly basally ascending, sparsely strigose (hairs white), eglandular. Leaves mostly basal (persistent) or basal and cauline; basal blades linear to linear-oblanceolate, (15–)30–70(–90) × 0.5–3 mm, cauline (on proxi mal 1 / 3 – 2 / 3 of stems) slightly reduced (bases abruptly widened, thickened, white-indurate, sheathing stem) margins entire, faces loosely strigose, eglandular. Heads 1(–3). Involucres 4–7 × 8–13 mm. Phyllaries in 2–3(–4) series, strigose to villous, minutely glandular. Ray florets 25–38; corollas usually bright yellow, sometimes cream to nearly white, 4–8 mm, laminae weakly coiling. Disc corollas 3.5–5.3 mm. Cypselae 2–2.3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 10–20 bristles. 2n = 18, 27, 36, 45.
Flowering May–Jul(–Aug). Open rocky slopes, grassland, sagebrush, bitterbrush, juniper; 700–2000(–3100) m; B.C.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
