On Aug 31, 3:17?pm, Jim Kingdon wrote:

Agreed that I would not recommend planting a Norway maple in the
United States (at least not in the mid-atlantic region where it has
escaped cultivation and now lives in wild areas:http://www.nps.gov/plants/alien/pubs...pl.htmalthough I'm
not sure that advice applies to all areas).

The site you're refering to is inaccurate, the red leafed tree in that
photo is not a Norway maple, true Norway maple is not red leafed nor
is it singularly trunked nor is it any more invasive than red maple or
sugar maple, probably much less so due to its inability to reach above
the forest canapy for light because of it's lateral spreading growing
habit. That may be the crimson king version they're depicting, which
is in no way invasive. Actually the various japanese maples are the
most invasive of the maples, especially within the perimeters of
forests as they prefer low light environs.