Plant: Annual, glabrous; sap milky; stems erect, 1-several from base, 1-4 dm, in larger plants generally < 5 mm diam near base Leaves: basal and cauline, alternate, 3-15 cm, dentate or ± narrowly lobed INFLORESCENCE: primary inflorescence a head, each resembling a flower; heads generally 1-5 per stem, ligulate; peduncles 2-8(15) cm; involucres generally 17-30 mm; phyllaries in 3-4 series, outer 2-3 series unequal, lanceolate to ovate, acute to acuminate, tips spreading, innermost series ± equal, linear-acuminate, >> outer, erect, generally ± membrane-margined; receptacle flat or convex, naked Flowers: many; ligules 15-20 mm, >> phyllaries, white or cream, often rose-tinged, especially beneath, readily withering Fruit: narrowly elliptic, weakly ribbed, tapered to a beak, 12-14 mm (including beak); body 8-10 mm, puberulent or appressed-scaly; beak stout, generally < body; pappus bristles 12-17 mm, stiff, wider at base, plumose with tangled hairs, often merely barbed at tip, white Misc: Gravelly and sandy desert soils, often partially supported in branches of shrubs; generally < 1400 m.; Feb-May Notes: Phyllary tips scarious-margined.Pappus bristles plumose. References: Kearney & Peebles; Arizona Flora. Hickman, ed.; The Jepson Manual. ASU specimans