Fireweed Epilobium angustifolium)

Fireweed photograph;  MN DNR, Welby Smith

Native perennial to 5'. Pink flowers with 4 round petals form on a tall, conspicuous spike which blooms from the bottom up. Common along roadsides mid to late summer. Stems are covered with alternate, willow-like leaves. The common name is derived from its responsive growth after fires. Fireweed is often one of the first species to colonize newly exposed areas.