Yes, they certainly do. I started a thread about Chihuahua Desert natives, and this was my most recent subject. The King Clone in the Mojave Desert is estimated to be 11,700 years old! That thread (and
@rockm) are the reason I found this thread. Thanks for your response.
As far as collecting, I have my eye on several victims, er, ah, that is individuals at the railyard where I work. They are small, and likely to be destroyed next time the area is cleared. So they have a better chance with me than with a bulldozer. Any tips on soil, pruning, fertilizing, etc?
I don't have any large nurseries within a 3 hour drive, so that's not my best option. Collecting seeds is definitely possible, though very, VERY slow.