San Diego sunflower, San Diego County viguiera

Viguiera laciniata A. Gray in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 89. 1859

Shrubs, 50–130 cm. Leaves mostly alternate; petioles (0–)3–7 mm; blades lanceolate to lance-ovate, 1.4–4.3 × 0.6–2.5 cm, margins ± laciniate, faces sparsely strigillose and gland-dotted or resinous (abaxial resinous, shiny). Heads (1–)3–9. Peduncles 0.5–5 cm. Involucres hemispheric, 8–12 × 6–9 mm. Phyllaries 20–25, 4–8 × 1.8–2.2 mm. Paleae lance-ovate, 4.5–7.3 mm (densely glandular). Ray florets 5–13; laminae 6–12 mm. Disc florets 50+; corollas 3.5–4.6 mm. Cypselae 1.7–3.5 mm (± strigose, margins ciliolate); pappi of 2 lacerate, aristate scales 1–2.5 mm plus 2–6 (easily detached) lacerate-erose scales 0.2–0.5 mm. 2n = 36.

Flowering Jan–Jun(–Sep). Xeric scrub; 90–800 m; Calif.; Mexico (Baja California, Sonora).

Within the flora area, Bahiopsis laciniata is found only in San Diego County; its range extends south into the xeric Central Desert area of Baja California.