Essjay001 wrote:

Martin Brown scribbled:

Wild ones from seed are not that precise. You can get down to a few
species A. palmatum and A. japonicum being among the most likely but
A. miyabei and A. nikoense are also possibilities.

All the more reason to destroy them!!!!!!!!!!!!!!!!!!

Why destroy them ? They are all pretty dwarf Japanese acers. Some are just
prettier than others.

Named cultivars of these species have been very carefully selected for
near perfect dissected or coloured foliage and/or autumn colour. If you
grow them on from seed just like eating apples you will usually get
something but not necessarily anything like as pretty as the parent plant.
But you could strike lucky.

Anyway introducing something into the UK that could decimate Sycamore, A.
pseudoplatanus, would be an event to be celebrated by most arborialists.
They are nothing but tatty bullying weeds.

Regards,
Martin Brown