return to: checklist; family Asteraceae; keys

Bidens pilosa L.

Herbaceous annual; upper leaves alternate, usually twice ternately compound; leaf segments more or less ovate, base cuneate, margin toothed, apex acuminate; heads borne on long pedicels; involucre 2-seriate; florets yellow; fruits cylindrical, topped by pappus segments some of which project upwards, most of which project horizontally.

Additional images: