2011-11-11 Vienna XXII. district - Danube National Park, Lobau (153 msm Quadrant 7864/2).German names: Hnge-Birke (+ Riesen-Goldrute)Solidago mainly in bokeh (foreground), fruiting; Betula in the background of course is only one among many of the tree species, but as it hasn't shed its leaves yet it is more prominent.