Photo: Ambrosia trifida 2.

Flowerstalks. Marburg bot.g., Germany. Planted. 2006-10-02.
Ambrosia trifida L. Engl.: giant ragweed, bitterweed, great ragweed, horsecane, horseweed, richweed, tall ambrosia, wild hemp. Deu.: Dreiblättrige Ambrosie. Suom.: sormituoksukki. Sven.: ambrosia
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Photo: Ambrosia trifida 2.