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.
The copyright information is here.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.
http://www.henriettes-herb.com - Copyright 1995–2020 Henriette Kress.