|Annual or bienniel weed which grows tall with alternating, hairless, bitter-tasting leaves that are edged by small teeth. Produces a rosette of leaves in its first season, then bolts into heavy bloom and seed reproduction. Yellow flowers appear at the ends of many-branched stems in summer. Appears on roadsides, disturbed areas or in open woods or pastures. Common throughout Europe. Also known as wild lettuce, this is the plant from which numerous named varieties of garden lettuce are derived.