This could be an Acer Buergerianum (Naruto). I have one that did the same thing that had me worried. After some research I found that this is how this spieces grows.
Bill Olson
It could be an Acer Buergerianum (Naruto) Maple. I have one of these and could not figure out why this was happening. After some research I found out it was how this spies grows.
Bill Olson