Washington Navel orange tree
I have a 8 year old Washington Navel orange tree a lot of oranges every year.There is also 7 or 8 3 to 4 pound yellow Hugh lemon shaped fruit, along with a lot of oranges.Do you know what they are?
The most likely thing that is happening, is that you have a few branches growing from beneath the graft point. This is pretty common. You can actually cut the branches that are producing these odd fruits. If you don't mind them being there, then you can just leave them as a little extra gift from the plant.