Lesser Burdock (Arctium minus) also known as: Common Burdock, Small Burdock, Smaller Burdock, Wild Burdock, Wild Rhubarb, Bardane and Beggar's Button. Burdock is also sometimes spelled Burrdock. Division - Magnoliaphyta Class - Magnoliopsida Subclass - Asteridae Order - Asterales Family - Asteraceae Genus - Arctium This is a biennial thistle. The flower heads attach themselves like velcro to the fur of animals, carrying the seed over long distances. Weeds Taxonomic List List by Scientific Name List by Common Name