arctium is a genus of biennial plants commonly known as burdock, family asteraceae.

arctium genus biennial plants commonly burdock family asteraceae native europe asia species introduced worldwide bloom blooming blossom botany branch bud closeup edible plant flora floral flower flowery fruit green hairy heads healthy herb herbal inflorescence invasive isolated leaf macro medicinal medicine natural nature pink pointy prickle purple remedy sharp spike therapeutic thistle thorn thorny treatment velcro wild yellow