Autumn colours catch the eye everywhere at this time of year. Red, orange and yellow in adundance. The bright red here is the autumn colour of the Rosebay Willowherb, more commonly referred to as Fireweed (Chamerion angustifolium). This beautiful plant is used both for food and medicine. Fireweed builds a thriving plant community by spreading its tiny seeds and with lateral root networks. In an island in River Ölfusá this is the case and the plant is overrunning other vegetation.