Proc. Amer. Acad. Arts 49: 344. 1913.
Perennials (may flower first-year). Leaves ± scattered over proximal 3/4+ of plant height, internodes mostly 30–75+ mm; lobes mostly filiform to linear, sometimes lanceolate, (5–) 15–35+ × 0.5–1 (–3+) mm. Ray laminae pale-yellow (fading to white), 2–4.5 (–6+) mm. Disc corollas 3–4.5 mm. Cypselae 2–3 (–5) mm; pappi 0, or 0.5–1 mm. 2n = 24.
Phenology: Flowering year round, following rains.
Habitat: Open sites, along streams, rocky canyons
Elevation: 100–1500 m
Ariz., Mexico (Chihuahua), Mexico (Sinaloa), Mexico (Sonora)
E. B. Smith (1989) treated plants of Coreocarpus arizonicus from the flora area and Mexico as var. arizonicus and other plants of the species from Mexico as var. pubescens (B. L. Robinson & Fernald) S. F. Blake.
"broader" is not a number.