Photo: Ambrosia ambrosioides 1.

Closeup of flower. Pipeline road, AZ, US. Wild. 1998-03-01.
Ambrosia ambrosioides (Cav.) Payne Engl.: Canyon ragweed, ambrosia-leaf burr ragweed, bursage, Giant bur-sage, Giant Bursage. Bot. syn.: Franseria ambrosioides Cav.
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Photo: Ambrosia ambrosioides 1.