By Kplatz
Ohio,
United States 
Can someone please tell me what this is growing on the roots of my flowering Cherry tree? The branches of the tree seem to be alive but only maybe a 1/4 of the tree has leaves and isn't looking good. If this is Canker i do not see any signs of it on the trunk or branches, but obviously something is killing the tree.
16 Aug, 2014
Answers
I have added additional pictures. Thanks for your help
17 Aug, 2014
Well it looks like some kind of canker - but I'd be very surprised if there wasn't evidence of damage like this further up the tree as well. You say the tree is only about a quarter alive - suggest you have it removed, and the roots bored out, asap. If you want another tree there, make sure you choose a canker resistant variety, and in particular, don't plant another tree from the Prunus group.
18 Aug, 2014
Thank you
18 Aug, 2014
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Need another picture from further away - its very hard to work out quite what I'm looking at, just looks like a lump of wood - is that soil behind it, or just corky wood? Have you checked the trunk for signs of canker?
17 Aug, 2014