Need help identifying a fruit.?

I found a fruit-bearing down here in Florida and tried one of the fruits. It was planted in an apartment complex with others like it so I doubted it was harmful. The tree and the fruit have a strong resemblance to a lychee. The fruit has a smooth, fuzzy, yellow rind which is easily peeled away and the translucent, white pulp was soft, tart, and very sweet. In the center of the pulp was a rather large pit like that of a lychee and I was wondering if this was some species of lychee and if it was safe to eat any more.