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Norway maple (Acer platanoides), an invasive tree

Acer platanoides Norway maple Aceraceae (sometimes included in the family Sapindaceae)

Norway maple is a canopy tree up to 65 feet tall native to Europe. The bark of mature trees is black, with narrow, longitudinal fissures and ridges in a fairly regular pattern. The bark of young trees is gray and smooth. The terminal winter buds are large, 0.6-0.9 cm (0.25-0.35 in.), wider than twig tip. They are green, to dark purple, and there are 3-4 pairs bud scales. The twig and leaf stalk sap is milky. These are some of the distinguishing characters that differentiate Norway maple from sugar maple and make identification of young trees easy.

The leaves are opposite, with a blade 8-18 cm (3.2-7.2 in.) wide, wider and darker than A. saccharum (sugar maple) leaves, but otherwise very similar. The autumn color is clear yellow, never red or orange, and the leaves turn color later […]