I know it's strange but i found several citrus trees growing near a river bottom in the lower ozark mountains... They were growing behind an old abandond school house. They trees have very long sharp thorns, and there were quite a bit of fruit still on them... most were shrivviling up, but we tried a couple, and they are definatly citrus... probably oranges... maybe a mother variety of some hybrid??? Do any of you have any experience identifying them? The fruit were golfball to small tennis ball size..with a very very citrusy smell... and had several seeds..