1A herbaceous plant of the daisy family, with burred fruits. It originated in tropical America but is now cosmopolitan.See also cocklebur
Genus Xanthium, family Compositae: two or three species, in particular spiny clotbur (X. spinosum)‘Beach clotbur has rough, sandpapery, triangular leaves and sharp burry fruits.’
- ‘Spiny clotbur has upright growth habit, long shiny dark green leaves, cactuslike spines and seeds like cocklebur (which it is related to).’
- ‘A green stripe of broad clotbur (Xanthium strumarium, or lachid hanehalim in Hebrew), a plant that grows in habitats in which there are seasonal water pools, attested that the leaks are a routine matter here.’
- 1.1North American A burdock.
Mid 16th century from dialect clote ‘burdock’ + burr.