Fireweed (Chamaenerion angustifolium)
A perennial with pink, purple or mauve flowers growing in clusters on the top of the reddish stem; blooming July to September. The fruit are narrow seed pods that split and release numerous tiny white seed heads. It has and unpleasant odor, is slightly hairly. It grows from 3 to 7 feet. Prefers full sun to partial shade, moist to dry, in sandy soil and thrives in burned areas and open wooded areas. Found throughout most of the United States.