Proc. Acad. Nat. Sci. Philadelphia 4: 21. 1848.
Leaves oblanceolate to lance-linear. Peduncles 10–130 mm. Involucres 6–10 mm. Phyllaries ± 8, usually distinct, sometimes connate to 1/2 their lengths, elliptic to oblanceolate, apices acuminate. Ray-florets ± 8; corollas yellow, laminae 10–20 mm, ± equally 3-lobed. Disc-florets 60–100. Cypselae obcompressed, 2–4 mm, 3-angled (ray), 4-angled (disc), uniformly gray-strigose. 2n = 20.
Phenology: Flowering Feb–Jun.
Habitat: Clayey areas in grasslands or openings in chaparral or oak or foothill woodlands
Elevation: 50–1600 m