Camperdown elm problem

I have just recently noticed that my weeping camperdown elm has now turned black and the bark is falling off of it. I have noticed the branches are very brittle and break off easily. I have had this tree for…

City trees – Ginkgo, Laburnum, Linden, Elm

What are the differences between Ginkgo, Laburnum, Little Leaf Linden and Pioneer  Elm.  What is the best tree as a street tree? Where can I see these after they have been planted?  …