I would like know what these tree are. They are located in San Diego county California. The trees may not be native. Thanks, Jon.
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The first tree looks like some variety of apricot to me. The leaves are young, so have not quite reached their full size and shape, but here is a picture of mature leaves to compare. mature apricot leaves and fruit
I agree with WheelerWonka that the second tree is some form of Avocado. The leaves are darker on your photo, but the flowers look to be very similar.
It's been a while since you asked this question - have either of the trees put on any fruit since your post that could help us be sure we have identified them correctly?