Garden Pests and Diseases: Desert Museum Palos Verde sick, matted leaves. Help!, 1 by Kell

Kell wrote:
PabLoLA, I wonder if you had a bad spider mite infection which caused growths of witches broom.

I was reading this article which says \"Spider mites are a pest that cause palo verde tree disease. When spider mites infest a palo verde tree, they cause witches\' broom.\"
[HYPERLINK@www.hunker.com]

Here are pictures of witches broom that look similar to your clumping leaves.
[HYPERLINK@www.researchgate.net]

And another photo I found online of a witches broom.