Plants 6-35 cm (self-incom-patible); glandular, not strongly scented. Stems purple-streaked or not. Leaf blades oblanceolate or lanceolate to linear, 4-70 mm, margins (basal leaves) toothed to pinnatifid. Involucres ± ellipsoid to campanulate, 5-12 × 3-12+ mm. Phyllaries 5-9, apices usually shorter than folded bases. Paleae in 1 series between ray and disc florets. Ray florets 5-9; laminae yellow, 4-15 mm. Disc florets 10-65+, corollas 5-8 mm; anthers yellow to brownish. Ray cypselae glabrous or sparsely hairy. Disc pappi of 16-22 white, ± equal bristles or setiform scales 4-7 mm, each proximally plumose and adaxially woolly. 2n = 16.

Flowering Apr-Jun. Grasslands, openings in chaparral, woodlands, on serpentine or sandy soils; of conservation concern; 100-900 m; Calif.

Layia septentrionalis occurs in the central and southern Inner North Coast Ranges and the Sutter Buttes (southern Sacramento Valley).