Sugar Maple (Acer saccarum) –
A Native Maple
Sugar Maple – Summer Leaf 
Sugar Maple – Summer seeds 
Sugar Maple – Winter Twig
VS
Norway Maple (Acer plantanoides) –
A Non-Native Maple
Norway Maple Leaf 
Norway Maple Seed 
Norway Maple twig
Can you see the difference in twig, seed and leaf?
Distinguishing tip:
Break a Norway maple leaf petiole (stem) and the sap is white. Break a Sugar Maple petiole and sap is clear.
