Arctium Genus --- Aster subfamily 4

burdock (Arctium minus) -- in September -- Bellvue, Larimer County Foothills, CO        red & pink         

burdock (Arctium minus) -- in September -- Lincoln National Forest, NM        ​ red & pink       

burdock (Arctium minus) -- in September -- Red Mountain Open Space, Larimer County, CO