Abiu, these are from my trees. A great fruit that has a refreshing custard like flavor. They vary a lot from tree to tree. My friend Scot has a tree that produces really big ones.
Here's a description from Frankies Nursery web site
Abiu (Pouteria caimito)—The abiu is a small evergreen fruit tree native to South America. The round bright yellow skinned fruits, which are borne directly on the tree branches several times a year, are considered one of the best fruits of the Amazon Basin. The white, translucent flesh is sweet with a slight flavor of caramel with honeydew melon and the texture of a well ripened persimmon. The Gray and Z-2 abius are selections from Australia with good quality fruits that weigh about a pound. The trees need some wind protection with good draining soil.