Senecio chenopodioides Kunth in A. von Humboldt et al., Nov. Gen. Sp. 4(fol.): 140. 1818; 4(qto.): 179. 1820; S. confusus Britten

Leaves: petioles mostly 1–3 cm; blades mostly 2–8(–12) × 1–5(–7) cm, bases broadly cuneate to truncate or rounded, apices acuminate to attenuate. Peduncles mostly 3–8+ cm. Calyculi of lance-deltate to filiform bractlets 2–10 mm. Involucres 8–12 × 12–20(–25+) mm. Phyllaries puberulent (hairs crinkled), glabrescent. Ray corollas: laminae 12–20+ mm. Disc corollas 8–12 mm, lobes 1.5–2.5+ mm. Cypselae (2–)4 mm; pappi 3–8+ mm.

Flowering year round, mostly winter. Disturbed sites, waste grounds; 0–100 m; introduced; Fla.; Mexico; West Indies; Central America.

Pseudogynoxys chenopodioides is widely cultivated as an ornamental. In Florida, it persists after cultivation; it may be encountered elsewhere along the Gulf Coast (a report from southern Texas has not been confirmed).