Photographer: Stephen L. Solheim
Xanthium strumarium L.
common cocklebur, rough cocklebur
Xanthium: from a Greek word meaning "yellow"
strumarium: of or pertaining to tumors or ulcers; rough
|Plant: ||erect, annual, 8"-18" tall forb|
|Flower: ||head green; inflorescence of several heads at the ends of the stem and from the leaf axils; blooms Aug.-Sept.|
|Fruit:||thick, dry seeds clustered in a 1/3" - 1 1/3" oblong bur with heavy, hooked prickles|
|Leaf:||long-stalked, widely oval to kidney-shaped and with a heart-shaped base|
|Habitat: ||disturbed sites, fields|