Galinsoga Ruiz & Pav.

1 species naturalized Aust.; all states and territories

*Galinsoga parviflora Cav.

Erect annual up to 60 cm high, glabrous or silky hairy. Leaves opposite, petiolate, ovate to ovate-lanceolate, usually toothed or lobed, up to 5 cm long. Heads axillary, on slender peduncles. Involucre hemispherical, 4 mm diam. Bracts 5, broad, nearly equal. Ray florets c. 5, female; rays white. 1–3 mm long, 3-lobed. Disc florets tubular, yellow. Cypselas angular, slightly flattened, slightly hairy, 1–2 mm long. Pappus of the ray cypselas reduced to a few minute bristles or absent; that of the disc cypselas of 12–20 chaffy scales, less than 1 mm long, ± plumose-ciliate. Widespread. Weed of cultivation and waste places. Introd. from America. Fl. summer. Potato weed