http://www.tropicalcentre.com/nieuwsbrieven/2008-26/newsletter.htm I couldn't find a reference to rescued or permitted plants. Is this legitimate or not?
According to the "about page" the plants are nursery grown in Texas. I don't see any claim that plants are wild collected--just that Joshua trees are "collector's item". Looks like a huge operation. http://www.tropicalcentre.com/aboutus/aboutus.htm?PHPSESSID=523cdb0125eefffc271f6f732d66568e
At typical rates of growth most of the bare root specimens look to be many decades old. Color me skeptical.