Here is another photo
I would be grateful for your help in identifying!

Without cones it will be hard to tell. It looks like fairly typical of distichum, which is quite variable. Why do you think it is mucronatum? Does it keep its leaves later and refoliate sooner? Mucronatum would be marginally hardy in zone 6 - maybe not at all hardy (not sure).

Here in Germany 'mucronatum' is not hardy in Zone 7.

Wolfgang

Thanks for the reply!
It is quite different from other swamp cypress trees ..
yet have information. when laying the botanical garden was planted one tree Mucronatum. did not trace it further ...
For all the time one gave only one cone. I collected seeds from cones of this, but they did not give germs.
now branches
this is it .. top, bottom is distichum

the seeds of this tree.

needles

Please look in the net.
There is 1 source : Taxodium mucronatum var. neomexicana, which is told as hardy in US Zone 5.
Is this a possibility?

I'm not familiar with the seed and needle-differences, so I cannot say something to your pics.

Wolfgang