

What monster am I fighting?
In my quest to clean up my yard, eliminate invasive and plant natives I have started war with whatever these are.
They get big. Like trees. I have one that’s nearly 20 ft tall coming down this weekend.
They sprout up SO FAST. Like I remove 20-30 a year that are the size of the one in the picture.
My dad told me they were walnut trees (which is why I left the large one), but I do not think this is right. Someone on my other post said it was an elm.
Google told me it was some sort of sumac.
The leaves smell very strongly of this perfume, citrus sort of smell when crushed.
They are fuzzy!
What are they and why are they so persistent?