Giant Willowherb is a tall, perennial plant that is native to North America, Europe, and Asia. It is also known as Fireweed, Rosebay Willowherb, and Great Willowherb. Fireweed is a reference to the plant's tendency to quickly colonize burned areas, while Rosebay Willowherb refers to the plant's pinkish flowers. Great Willowherb is another common name, as the plant is known for its towering height. In addition to these synonyms, there are many regional names for the plant. In Scotland, it is called Bombweed, while in Newfoundland it is known as Blooming Sally. The plant has also been given nicknames such as Cripple Creek, Pink Plume, and Purple Rocket.