A friend instant messaged me yesterday asking if I wanted some avocados from her mother's tree. Sure! When I met up with her to get the avocados, I was surprised by their size and color. They were very small, and had smooth, black skin. She said they were Mexicola avocados.Apparently, the skin is edible, but you don't have to eat it. The avocados are small in size, but pack a lot of flavor, and the texture is buttery. They originated in 1910 in Pasadena, CA The trees are frost-resistant and hardy to 18° F, and they're ready for harvest from September to October. If your neighbors have a Mexicola avocado tree in their yard, or if you see some at your local farmer's market, give them a try.