Firstly,, I’d like to ID this tree. It very columnar and presently about 25 feet tall.

Then, there is an issue with weedy looking shoots about 20 feet away that some folks are saying are ’runners’ from those trees. To my eye they don’t look quite the same, but...sure seem like they could be.

and...

If these are just offshoots, I’m trying to find out the best way to deal with them, so as not to make the problem worse.

Thanks!!