Colin Varndell / Lesser burdock (Arctium minus) flowers, Dorset, UK, July.

Alex Hyde / Lesser Burdock (Arctium minus) seedheads (burrs) showing velcro-like hooks that catch on animal fur, Peak District National Park, Derbyshire, UK. April.

Nick Upton / Lesser burdock (Arctium minus) with red stems and purple tinged spiny bracts on the flowerheads, about to flower in rough grassland near the coast, Gower Penisula, Wales, UK, July.

Mike Read / Brimstone butterfly (Gonepteryx rhamni) male feeding on Lesser burdock (Arctium minus) Westhay Moor Nature Reserve, Somerset Wildlife Trust Reserve, Avalon Marshes, Somerset Levels and Moors, Somerset...