Seeds from desert regions

After learning about the work Mark Shepard has done to 'self select' plants that thrive in his environment I'm interested in finding seeds that at least have a family history of dealing with desert conditions.  I'm in Tucson, Arizona (zone 9) looking for Leucaena leucocephala and Elaeagnus angustifolia (both non-native).  I don't think I have the time or patience to create a landrace strain of my own.  Is there an online vendor from a desert region?  If this topic has been discussed previously please point me to it.

Thanks!
Brian

I don't know about either of those in particular, but you've got one relatively native desert plant already at your disposal - Mesquite! it's quick growing, nitrogen-fixing, and has edible bean pods(for both man and beast)!

Howdy Brian, have you seen this native seeds website?

Thanks - I've been using Mesquite but I believe other trees offer much better nitrogen fixing.  Native Seeds is great, I highly recommend them.  Unfortunately they don't offer much for nitro fixers outside of their beans and peas.

Hey Brian,

Try the Desert Legume Program at the University of Arizona.  https://cals.arizona.edu/desertlegumeprogram/seminum.html
They have tons of great stuff!