J. Arizona-Nevada Acad. Sci. 36: 8. 2003.
Plants 10–100 cm (taproots much thickened). Stems unbranched or branched near bases. Leaves crowded near stem-bases; petiolate; blades oblanceolate, rarely pinnatifid, membranous, margins usually crenate, faces velvety. Heads usually borne singly, rarely 2–3 together. Peduncles hairy (hairs whitish, matted). Involucres 15–35 mm diam. Ray corollas yellow, abaxial veins green, laminae 9–12 × 4.5–6 mm. Disc corollas yellow. Cypselae (obovate) 5–6 × 3–4 mm. 2n = 30.
Phenology: Flowering May–Oct.
Habitat: Grasslands on rolling hills, often with oak, pinyon, and juniper
Elevation: 1300–2100 m
Ariz., Mexico (Chihuahua), Mexico (Sonora)
Roots of Berlandiera monocephala are sold in local Mexican drugstores for stomach and lung troubles (B. L. Turner 1988d) and for insect or snake bites.
"broader" is not a number.