The inspiration for Velcro

Common Burdock (Arctium minus) is an invasive weed, but I always find the prickly burs attractive. This macro shot was taken on 2 September 2013, in the Boat Launch area in Fish Creek Park.

"The prickly heads of these plants (burrs) are noted for easily catching on to fur and clothing (being the inspiration for Velcro), thus providing an excellent mechanism for seed dispersal." From Wikipedia.