Arctium Genus --- Aster subfamily 4
burdock (Arctium minus) -- in August -- Lions Open Space, Larimer County, CO
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