Keywords: 20140312Populus tremula.jpg Zitterpappel Populus tremula an der Saar in Saarbrücken own AnRo0002 2014-03-12 Cc-zero Populus at Saar in Saarbrücken Tremula 03 Trees at Saar in Saarbrücken left bank Populus tremula 03 Populus in Saarland in March Populus tremula Populus tremula in Saarland 03 Populus tremula in March Catkins Populus tremula Catkins in March Populus tremula |