What is Wrong with this Tree?

Asked May 21, 2013, 7:24 AM EDT

What is affecting this tree and what should I do about it? Almost all of the leaves on this small tree have this gall=like symptom.

Prince George's County Maryland

1 Response

This is a type of gall, or abnormal tissue swelling, probably a spindle gall.
They are not concerning and do not need treatment.
Here is a publication explaining leaf galls: http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG31_Insect_and_Mite...