any coarse weed of the genus Xanthium having spiny burrs

[ Syn: cockle-bur , cockleburr , cockle-burr ]

burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use

[ Syn: great burdock , greater burdock , arctium lappa ]