Some maples (sugar) are more desirable than others (Norway)
(WorldNews Norway)

It`s not easy to figure out which maples you want on your property. The good ones are the sugar maples, their leaves ablaze each fall in yellow, red and orange. The less desirable ones are the Norway maples, their leaves green well into fall. I don`t hold that lingering greenness against Norway maples. What I do hold against them is the way they leaf out so early in spring, suddenly creating deep shade, shade so dark that nothing, including lawn, can grow underneath. THE SUCCESS OF NORWAY MAPLE Compound this dense shade with extreme fecundity, tolerance to pollution, and the ability to grow under a wide range of light and soil...