I am working a theme right now. Dandelions are common but their structures are fascinating. They carry downy umbrellas to catch the wind and fly but have a barbed seed pod to cling on to passers by. They have evolved with distribution in mind and do it very effectively. Each head is composed of hundreds of barbed darts read to take flight.
Canon 1D X, Canon 100/f2.8L IS
100mm, f5.6, 1/100 sec @ 800 ISO