Wikipedia: Burdock - Article covering the uses, size and species of this herb. University of Maryland Medical Center - Provides an overview, precautions, and possible interactions with burdock. Supporting research is also available. Herbazest - Burdock - Gives a detailed explanation on burdock's medicinal applications, as well as information on the plant, its compounds, and consumption. Illinois Wildflowers - Burdock's description, cultivation and faunal association. High resolution images available. Calphotos: Burdock - Photographs. Sloan-Kettering - Burdock - Provides a clinical summary together with its purported uses and constituents.