Streams are often surrounded by trees due to the constant availability of sufficient water. Without human intervention, the Rodau would also largely flow through a softwood riparian forest. The typical tree species in these alluvial forests are the black alder, various types of willow, the black poplar, the bird cherry and the common ash. Today, the tree population on the Rodau mainly consists of alders planted on the Oberwiesenweg, which have the task of stabilizing the stream bed. There are also various willows, including some characteristic weeping willows, and a few columnar poplars. Especially after the Second World War, columnar poplars were planted along streams in many places. Visible from afar, marking the course of the stream, poplars used to grow in many places along the Rodau. These were formerly also referred to as "Pelle-" or "Bellebehm"; derived from the then botanical name Abele populus. A popular pastime for children at that time was catching "Haahupper" (grasshoppers) on the "Bellebehm". In the Lengertenwiesen on Albert-Einstein-Straße there is still a row of poplars that marks the area "Between the Pellen". could become a danger. But there is one exception: more than 100 years ago, before the First World War, the miller Maneval planted some poplars here. One of these trees has survived to this day. The tree standing here is by far the oldest poplar in Rödermark.
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