Mem. Amer. Acad. Arts, n. s. 4: 73. 1849.
Leaves 1–4 cm. Heads terminal. Peduncles 2–9 cm. Phyllary margins prominently ciliate. Disc-florets corollas 1.5–2 mm. Cypselae 2–2.5 mm, bodies thickened, narrowly elliptic-lanceolate to elliptic. 2n = 6.
Phenology: Flowering (Feb–)Mar–Apr.
Habitat: Open sites, sandy soils, roadsides, mesquite savannas
Elevation: 100–400 m
Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Nuevo León)
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