||Arctium minus (Hill) Bernh.
||clotbur, cockle button
||A biennial with large leafed rosette the first year and branched perennial with dandelion-like leaves forming a rosette.
||Cotyledons are ovate with a waxy surface. Young leaves are egg-shaped on the end of long redish-purple petioles.
|True Leaves and Stem
||Plant forms a basal rosette first year and has branching stems the second year.
Leaves are very large, heart shaped, and has wavy margins. Plant resembles a hairy version of rhubarb the first year.
Undersurface of leaf is woolly, upper surface is smooth. Stems are hoolow, grooved, and angular.
|Flower and Fruit
||Purple disk flowers are produced the second year and look like those of thistles. Flower head dries to form a bur with hooked bracts that adhere to surfaces like velcro.
Seed is enclosed in an achene.