Looks like larch, maybe a dwarfed variety?

I would say a larch, Larix, too! No idea which one :-)

You could indeed plant the seeds, but they'll take years to get to a decent sized plant, let alone a tree, so you'll need a lot of patience. They might also take a long time to germinate, so stick a few in a pot, put it in a safe place outside and forget about it for a while. ;-)

(Water it 'IF' we get dry weather!)