[Wildflowers of the Sunflower Family with Discoid Flower Heads in the Columbia River Gorge of Oregon and Washington]

Common burdock as seen along one of the forested trails at the Sandy River Delta, Troutdale, Oregon...........September 8, 2012.

Basal leaves of common burdock as seen at left along the Angels Rest Trail in the Columbia River Gorge.........May 18, 2009. The photo at right shows the basal leaves of common burdock amongst numerous canadian thistle leaves (Cirsium arvense) at Stiegerwald Lake National Wildlife Refuge......May 10, 2022.