Photo: Populus tremula.

Autumn coloration. Annala, Helsinki, Finland. Wild. 1999-09-21.
Populus tremula L. Engl.: aspen, European aspen, quaking aspen. Deu.: Zitter-Pappel, Espe. Suom.: haapa, metsähaapa. Sven.: asp, hängasp. Fran.: peuplier tremble
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Photo: Populus tremula.