Keywords: 20130830Populus tremula1.jpg Zitterpappel Populus tremula an der Saar in Saarbrücken own AnRo0002 2013-08-30 Cc-zero Populus at Saar in Saarbrücken Tremula 08 Trees at Saar in Saarbrücken left bank Populus tremula 08 Populus in Saarland in August Populus tremula Populus tremula in Saarland 08 Populus tremula in August |