spiny cocklebur
prickly burweed
Bathurst burr
xanthium strumarium latin

Xanthium spinosum is a species of flowering plant in the aster family known by many common names, including spiny cocklebur, prickly burweed and Bathurst burr.

Xanthium spinosum L. - Spiny Cocklebur, Burreed, Bathurst Burr.

Euaresta bullans has been introduced, perhaps accidentally, from South America to California and Arizona, southern Europe, the Middle East, South Africa and Australia, where it attacks spiny cocklebur (Xanthium spinosum).