Xanthium n. : A genus of composite plants in which the scales of the involucre are united so as to form a kind of bur; cocklebur; clotbur.

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Taxonomy
Cocklebur, plant, species, seeds, Xanthium, unranked, Annual plant, free encyclopedia, Cockleburs, family Asteraceae, Spiny Cocklebur, Rough Cocklebur, genus, the leaves, the seeds, Asian species, Angiosperms, Asterales.

Defination from the web:
Xanthium) are a genus of flowering plants in the family Asteraceae, native to the Americas and eastern Asia. Contents. 1 Growth. 2 ... Xanthium strumarium - Clotbur, Rough Cocklebur, Large Cocklebur, Common Cocklebur. North America, extensively naturalized elsewhere. Syn. ...