Learn to identify common backyard weeds Hundreds of full-color photographs with easy-to-understand text make this a great visual guide to learning about more than 150 species of weeds--toxic, edible, or otherwise interesting--found in the Upper Midwest, including Illinois, Indiana, Iowa, Michigan, Minnesota, North Dakota, Ohio, South Dakota, and Wisconsin. The species (from Dandelion to Purslane) are organized by type, then by flower color, so you...