Lone Gall

Photo by Marty Horowitz 8/20/2016

Gall on Creosote Bush (Larrea tridentata)

Next time you see a Creosote Bush, take a closer look and check for galls. (Yes, I've blogged about this before; see this post.) Once you know to look for them, you'll see them all over! Basically, galls are the plant's response to insect invasion.