Ask-a-Dave's-Gardener: Please help! Can you identify this deformation?, 5 by jeff1184

jeff1184 wrote:
There are several shrubs and trees in my front and back yard that are not growing leaves this summer but only small miniature leaves and flowers. The hydrangea is growing round pom pom type growths on the bare branches. I have attached pictures of my hydrangea (2), rose bush, Japanese maple and another tree in my backyard. I am not sure if this is soil related or a virus, but it seems to be taking over my yard and killing my plants/trees.