Flowering plants. Botanical garden Kaisaniemi, Helsinki, Finland. Planted. 2005-04-17.
Petasites albus (L.) Gaertn. Engl.: white butterbur. Deu.: Weisse Pestwurz. Sven.: vitskråp
The copyright information is here.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.