Bidens cernua

Suketeni

Stems to c. 50 cm. Leaves to 12 cm, simple, lanceolate, amplexicaul. Capitula, nodding, discoid. Involucre 10-25 mm broad . Achenes weakly 4-angled, bearing 4 aristae. Fl. 8-9. Marshes, 610-1060 m.

Europe, Caucasia, N. Asia, N. America.