Fruct. Sem. Pl. 2: 456. 1791.
Leaf blades 3–10 × 2–5 cm. Ray corollas: tubes ca. 2 mm, laminae narrowly ovate to linear, 2–4 mm. Disc corollas ca. 3 mm. Cypselae ca. 4 mm. 2n = 36, 38, 40.
Phenology: Flowering (sporadically) year round.
Habitat: Ruderal in ± wet places
Elevation: 0–10 m
Introduced; Fla., Mexico, West Indies, Central America, South America, also introduced in Asia, Africa, Pacific Islands, Australia.
Synedrella nodiflora probably is a recurrent introduction and probably does not persist in the flora area.