Cotula L.
Peduncles solid, exceeding the leaves at flowering
Leaves entire toothed or coarsely lobed, oblong-lanceolate to broad-oblong, 2–6 cm long, stem-clasping. Heads on solitary terminal peduncles. Involucre 6–10 mm diam.; bracts oblong. Outer female florets, in a single row. Disc florets very numerous, yellow. Cypselas 1–2 mm long; those of the female florets broadly winged, on distinct pedicels; those of the disc florets with a narrow wing, on short pedicels. Glabrous perennial with weak succulent stems. Widespread. Wet situations, fresh or brackish water. Fl. winter–spring. Waterbuttons Cotula coronopifolia
Leaves once or twice pinnatisect, obovate to oblanceolate, c. 2 cm long. Heads on solitary terminal peduncles. Involucre 3–5 mm diam.; bracts oblong to oblanceolate. Outer female florets in 3–4 rows. Disc florets yellowish white to greenish. Cypselas pedicellate; the outer ones winged; the inner ones wingless. Prostrate to ascending, ± hairy herb. Widespread. Weed of cultivation and waste places, pastures and open forests. Fl. most of the year. Common Cotula or Carrot Weed Cotula australis