Stems (1-)3-5(-10), erect (when single) or decumbent to ascending, branched proximally and/or distally. Distal cauline leaves oblanceolate to lanceolate usually pinnately lobed (from bases to near apices). Calyculi of 5-12+, oblong to linear bractlets (sometimes ± intergrading with phyllaries). Involucres 6-9(-11) × 2.5-5(-7) mm. Phyllaries 12-21+ in 2-3 series. Corollas medium yellow, 8-16 mm; outer ligules exserted 4-8 mm. Cypselae ± prismatic (5-angled), 1.3-1.7 mm, 5 ribs more prominent than others. 2n = 14.

Flowering Mar-Jul. Open sandy areas, dunes, or between shrubs in island chaparral; of conservation concern; 0-100 m; Calif.

Subspecies philbrickii is known only from Santa Barbara Island.