So I work on a 60,000 acre wildlife management area that has a lot of history. It has wild citrus growing all over the site. Sometimes I wonder if some of the fruit can date back to when the Spanish first arrived, as the area was inhabited by Native Americans as far back as 500 BC. There have been citrus groves in the area in the past too, so I'm sure hunters and hikers may have spit out a seed or two at one point. I found this lemon growing in what is known as Big Mound City. It has a zipper skin and the inner segments are easily separated like a mandarin. I was just wondering if anyone has seen a citrus fruit like it before? I also came across a small mandarin that has amazing flavor, but it is quite seedy. Most of the fruits I find are sour oranges or small round kumquat like fruits.

Does anyone know what this tree is?