Asiatic Tearthumb's picture
September 3, 2017
vine with distinctive triangular leaves
blue berries on vine

Many places near Harrisburg have lots of this very distinctive vine to be seen, and I was surprised to find a plant so wholly unfamiliar. Turns out it is Asiatic Tearthumb (Persicaria perfoliata), and per the wikipedia page it was introduced in Pennsylvania and has spread outwards from there.