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I have had my Amur Maple for 3 years now and this winter I noticed a discoloring of the bark. Instead of the natural grey bark it has turned a darker brown, so far it is only on this one branch. Has anyone seen this before? Thanks for any feedback.

I do not know the species, so I am not committing to this answer. But..



Amur Maple -- characteristics
Amur maple has 3-lobed leaves, with the middle lobe longer than the others and tapering to a sharp point. Each leaf is 1-1/2 to 3 inches long. The large multistemmed shrub or small tree can grow 15 to 18 feet in height, with an equal spread. Amur maple bark is gray-brown and smooth with some dark stripes or striations. The dark green, glossy foliage turns yellow and red in the fall. The yellow-white flowers are fragrant and open in mid to late spring. Seeds are borne in winged, propeller-shaped samaras.


Hope it helps

Thanks I will check out the link you provided.