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