in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 668. 1836.
Leaves: basal and proximal spatulate to oblanceolate, bases narrowed; mid ovate to lanceolate, bases usually semiclasping; distal leaves similar, smaller. Peduncles (4–) 8–20 cm, expanded distally, sparsely pilose proximally, moderately to densely pilose distally. Involucres hemispheric to globose, 9–17 × 12–20 mm. Phyllaries: outer usually 8, inner 9–13. Ray corollas 10–22 × 4.5–9.6 (–11.6) mm. Disc corollas 5.1–7 mm. Cypselae 3–4.5 mm; pappus-scales 2–3 (–4.1) mm, apices usually rounded to acute or acuminate, rarely cuspidate, not aristate. 2n = 34 (?), 36, 37 (18II + 1I), 38, 39 (19II + 1I), 39 (18II + 3I ?), 40.
Phenology: Flowering (Jan–)Mar–May(–Sep).
Habitat: Roadsides, open fields
Elevation: 10–900 m
Tex., Mexico (Coahuila), Mexico (Nuevo León), Mexico (Tamaulipas)