Photo: Xanthium spinosum.

Very very spiny young plants. Linnés trädgård, Uppsala, Sweden. Planted. 2003-06-20.
Xanthium spinosum L. Engl.: spiny cockleburr, spiny clot burr, spiny clot-bur. Deu.: Dornige Spitzklette. Span.: abrojo, amor seco. Bot. syn.: Acanthoxanthium spinosum (L.) Fourr.
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Photo: Xanthium spinosum.