It's often referred to as the "Mother Tree." For more than 100 years this tropical tree, which is native to Central America and Mexico, has managed to survive in the Arizona desert by the grace of Mother Nature.Just northeast of Tucson on a private ranch lives an Aravaipa avocado tree. Although no one can definitively say how this tree found its way into the Arizona soil, it hasn't stopped people from speculating.So, how has this Aravaipa avocado tree managed to survive and can other Aravaipa avocado trees be grown in Arizona?In this week's episode of Valley 101, a podcast from The Arizona Republic and azcentral.com, we talk with horticulture experts and rare fruit enthusiasts to find out.Learn more about your ad choices. Visit megaphone.fm/adchoices