Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) female in field of Fireweed (Chamerion angustifolium), Katmai National Park, Alaska

Sumio Harada / Dwarf Fireweed (Epilobium latifolium) and Arnica (Arnica sp) growing in Rocky Mountains, North America

Thomas Mangelsen / Mixed autumn forest of Birch trees, Black Spruce, Lichen and Fireweed flowers near the Tanana river, Alaska

Tim Fitzharris / Fireweed (Chamerion angustifolium) Asters and Paintbrush (Castilleja sp), North America

Jim Brandenburg / Fireweed (Chamerion angustifolium) in field, Northwoods, Minnesota

Jim Brandenburg / Fireweed (Chamerion angustifolium) and Pine (Pinus sp) trees, Northwoods, Minnesota

Ross Hoddinott / Rosebay willowherb / Fireweed flowering {Chamerion angustifolium angustifolium} UK

Bernard Castelein / Rosebay willowherb / Fireweed flowering {Chamerion angustifolium angustifolium} Belgium

Duncan Mcewan / Rose bay willowherb (Chamerion angustifolium angustifolium) or fireweed. Dispersal. UK seeds, summer.

Duncan Mcewan / Rose bay willowherb / Fireweed flowers

Duncan Mcewan / Rose bay willowherb / Fireweed flower, UK

Albert Aanensen / Mount McKinley, Denali NP, Alaska, USA

Pascal Tordeux / Fireweed / Rosebay Willowherb / Great Willowherb (Chamerion angustifolium angustifolium). French Alps, July.

Michael Quinton / Gray Wolf (Canis lupus) portrait amid Fireweed(Chamerion angustifolium) flowers, Alaska

Michael Quinton / Gray Wolf (Canis lupus) portrait amid Fireweed(Chamerion angustifolium) flowers, Alaska

Matthias Breiter / Polar Bear (Ursus maritimus) in a field of fireweed, Hudson Bay, Canada

Wild Wonders of Europe / Widstrand / Abstract Fireweed / Rosebay willowherb (Chamerion angustifolium angustifolium) Kuhmo, Finland, September 2008