Plants 5-18 cm; proximal, un-branched portions of primary stems usually shorter than branches supporting heads. Leaves mostly on primary stems (distal leaves of primary stems densely congested) and immediately proximal to branches supporting heads. Heads usually erect in bud and fruit. Phyllaries 3-6, hirsute and/or hirtellous near folded edges. Ray florets 3-6; laminae 2-5 mm. Disc florets 8-20, mostly bisexual and fertile, sometimes functionally staminate. Ray cypselae not gibbous, beakless; pappi 0.2-0.5 mm. Disc cypselae 2.8-3.2 mm; pappi of 8-10 oblong or quadrate, fimbriate scales 0.2-0.5 mm. 2n = 18.

Flowering Apr-Jun. Serpentine openings in chaparral; of conservation concern; 500-1000 m; Calif.

Harmonia hallii occurs in the southern Inner North Coast Ranges.