Looks like it could be Ulmus thomasii, a native North American species.
Called rock elm or cork elm. Although not in all books it is cultivated
and listed in Hortus Third.

Gene

Dr. Stefan Burkart wrote:

Hi!

a friend of mine has an unidentified shrub in his garden (germany):
http://www.gmx.de/mc/vHH8EuFQSLhiuaiPYIflALSdD8CeE9
then enter Mediacenter.
leaves 3-5 cm long. Twigs have a very thick and wrinkled bark.

I'm a biologist and botanist, but I don't know this plant. Suggestion
is Nothofagus, but I'm not shure.
Can you help me?

many thanks,

Stefan