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Malheur Experiment Station
Oregon State University

Xanthium strumarium

common cockleburr (Xanthium strumarium)
Xanthium strumarium
Common Names common cockleburr
Family Composites, Sunflower
Flower Color Green
Plant Type Forb
Introduced North America
Native No
Weed Yes

common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)

common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium) common cockleburr (Xanthium strumarium)
common cockleburr (Xanthium strumarium)

Common cockleburr is a very widely dispersed plant. The greenish-red stems are spotted. Cocklebur is toxic to livestock, and grows in most disturbed sites. It is an erect plant about 2 to 4 feet tall. The burs are almost like Velcro spines, allowing it to be dispersed easily is animal fur, and referred to by most outdoorsmen as hitchhikers for their ability to cling to shoelaces and socks.


For additional information please send an e-mail request to:
Dr. Clinton C. Shock
Clinton.Shock@oregonstate.edu

Malheur Agricultural Experiment Station
595 Onion Avenue
Ontario, OR 97914
(541) 889-2174
FAX (541) 889-7831

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