Photo: Bidens tripartita 4.

Flowering tops. Annala, Helsinki, Finland. Wild. 2004-08-19.
Bidens tripartita L. Engl.: threelobe beggarticks, water agrimony, bastard agrimony, bastard hemp, bur-marigold, burr marigold, cuckold's beggar-ticks, swamp beggar-ticks, trifid bur-marigold, water hemp. Deu.: Dreiteiliger Zweizahn, Sumpfzweizahn. Suom.: tummarusokki. Fran.: bident à trois folioles, bident trifoliolé, bident triparti, chanvre d'eau. Ital.: forbicina comune. Bot. syn.: Bidens acuta (Wieg.) Britt., Bidens bullata L., Bidens comosa (Gray) Wieg.
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Photo: Bidens tripartita 4.