Perhaps it depends on location, but it has not been invasive for me. I have had this cultivar in dappled shade in my garden in northern Ohio...
It looks like Tilia americana to me.
This is called gummosis, and is quite common on species in the Prunus genus, but the underlying causes of gummosis can vary. Here in the U.S. I...
It looks like a basswood....Tilia americana
Also similar to white ash based on shape of the leaf scar in the 2nd pic. Green Ash typically has a flat top on the scar with the bud sitting on...
I have no doubt that it is an oak. After further review I would agree that the bark isn't deeply furrowed enough to match with Q. montana. The...
I would like to see the buds and fruit for confirmation, but I would say it looks like Quercus montana
What species of leafhopper do you think this is, and did you get any other pics of your pest? Every summer we see potato leafhopper here in Ohio,...
There is no doubt in my mind that that is woodpecker damage. Without seeing the larvae or galleries we can only guess at the identity of the...
I think it might be instead Acanthus spinosus which is a bit hardier than A. mollis.
All species of Acer are host species. That includes A. palmatum and A. japonicum. I hope it doesn't get any closer to you.
That is an insect problem, not a fungal problem. That is a very heavy population of some kind of scale insect. I can't see enough detail to...
Horned oak gall or something similar. http://web.extension.illinois.edu/fjprw/downloads/5600.pdf
Prunus x. 'Cistena'...it will rarely set fruit, at least here in Ohio.
The pest issue on the leaves is Elm Leaf Miner: http://oregonstate.edu/dept/nurspest/elm_leafminer.htm
