alnus glutinosa grows on the bank of the wuhle river in december. berlin, germany

yellow wuhle wood winter wild undefined twig trees tree species small sky seed season river red public pollen plants park outdoors natural male macro hanging growth grows green glutinosa germany frosty fresh foliage flower flora female family european detailed detail december cones cone common closeup catkins catkin brown branch botany blossoms blossom blooming bloom black betulaceae berlin beautiful bank alnus alder