Norway maple was introduced to North America in the early 20th century and is now considered an invasive species. Because it is so tolerant to shade, it out-competes the North American native sugar maple. However, its canopy is denser than that of sugar maple, so fewer wildflowers are able to grow beneath, reducing biodiversity.
How to identify?
Mature Norway maple trees can grow to 25m. The bark is grey with fine ridges, and the twigs are slender and brown with tiny white spots.