Hemizonia congesta subsp. leucocephala (Tanowitz) D. J. Keil; H. leucocephala Tanowitz

Leaves villous (the distal often with hairs longer at margins), all or distal glandular, often sparsely (rarely eglandular). Heads (some or all) usually in glomerules, sometimes in corymbiform or paniculiform arrays. Peduncles 0 or 1–4 mm, bracts not surpassing phyllaries. Calyculi 0. Phyllaries 6–10 mm, apices usually longer than bodies. Ray florets 5–13; laminae white, abaxially purple-veined. Cypsela widths 0.5–0.6 times lengths. 2n = 28.

Flowering May–Nov. Grasslands, meadows, marsh edges; of conservation concern; 0–100 m; Calif.

Subspecies congesta occurs in the San Francisco Bay area and North Coast Ranges. Natural hybrids between subsp. congesta and subsp. lutescens have been reported (E. B. Babcock and H. M. Hall 1924).