Bidens frondosa
Tall Beggar Ticks aka Stick Tight, Devil's Boot Jack
North America

Tall, coarse textured annual weed of cultivated and neglected farmland. Likes fertile, clay, usually wet soils.
 
 
 
 
 

 

Has barbed awns on the fruits which stick to fur, hair and clothing as a method of dispersal for the seeds.

 
 
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