Help me figure out what this fruit bearing plant it!?

I have a bush/tree thing (it looks like a really short tree) that produces both oranges and grapefruit on the same bush. Any idea what it is?

fishlakeguy2011-01-09T17:00:57Z

Favorite Answer

It is two fruit trees grafted together at the nursery, so they can produce small quantities of different fruits. Not uncommon.