1. 
   Xanthium strumarium
   Xanthium strumarium (syn. X. canadense, X. chinense, X. glabratum, Rough Cocklebur, Clotbur, Common Cocklebur, Large Cocklebur, Woolgarie Bur) is a species of annual plants belonging to the Asteraceae family. It probably originates in North America and has been extensively naturalized elsewhere. ==...
   Found op http://en.wikipedia.org/wiki/Xanthium_strumarium
   
   
2. 
   Xanthium strumarium
   (from the article `cocklebur`) ...enclosed in oval green, yellow, or brown burs that have many hooked spines and two large hornlike spines. The ripe burs adhere to the hair of ... ...is thin and flat, and the surface area is increased by the presence of an even thinner expanded margin (wing). Some h...
   Found op http://www.britannica.com/eb/a-z/x/1
   
   

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