We just moved into a new house a couple of monthes ago (San Mateo, CA) and there are several fruit trees in the back yard - peach, plum, apple, lemon. There is also one more that we havnt been able to identify yet, it has small yellow fruit, currently about the size of a mature cherry. The tree is fairly good size, maybe 15 ft high. I have no idea what it might be. Any help would be appreciated.
yellow plums, they are nice to make jelly from, or wine.. and if you take them and inject with vodka then freeze they make a nice cool summer(adult) treat!