I have a lime tree that has one main branch grwoing these weird things. The rest of the tree is a normal lime tree. About 10 feet on each side of the lime tree I have a Washington Naval tree and a Ruby Grapefruit Tree. These "Loranges" are smaller then my limes. Any help on these would be appreciated

Looks like poncirus trifoliata. Does the branch making these have trifoliate leaves? Do they taste disgusting with a very sticky gummy substance inside? I'm guessing the poncirus rootstock the lime is grafted to managed to grow a branch.

Not sure what to do about it, others with experience can advise. If the branch making these isn't taking over the rest of the tree, and the tree is producing lots of limes and is happy, then I guess it would be fine to leave the tree as is? Sounds nice having a tree with 2 varieties on it

You can plant the seeds from the poncirus to grow rootstock then graft your other tasty citrus varieties onto the rootstock. Grow yourself an orchard

No seed? That would rule out poncirus trifoliata.

It is rootstock. What is your location ?

I am in Fresno, California. The tree is a normal lime tree, typical lime you buy at the grocery store. There is one branch that is growing these weird limes. Here is pics on the tree, sorry about the light it is getting pretty dark out

No trifoliate leaves, and no seeds, so doesn't seem to be poncirus trifoliata. Very interesting! What do these taste like?

It could be a strange budsport of the Lime. Is the tree a Tahiti lime ? Does the branch that produces these fruit originate below the graft line if the tree is grafted ? Try to get better photos of where the branch sprouted from the main tree.

There is one leaf in the last picture that looks like trifoliata of some sort, 4 leaves left of the fruit.

Probably some sort of citrange(rootstock). If it were me, I'd cut that branch off as the fruit are not edible. Is the branch below the graft?

A Citrange or any other rootstock should have seeds...

Occasionally, fruit from a tree that produces seedy fruit, will develop a few fruit without seeds. As Hershell noted there does seem to be a trifoliate leaf just above and left of the fruit in the last picture. - Millet (401-)

That may just look that way in the photo at that angle. Have you ever seen a trifoliate produce regular leaves & 1 single trifoliate leaf ?

Still hard to say without better photos...

The fruit is actually decent, has a distinct lime taste. It is pretty overcast here, but I will take more pictures today and post them. Thanks for the help!

On the branches where the odd fruit is growing there does seem to be three section leaves, as mentioned on particular rootstocks. Some of the leaves are single, but there are some that look like



I have checked about 10 of the fruits and none of them have seeds, here are two pics that compare the limes to the sour orange fruit.





So it looks like the rootstock is just randomly sprouting branches off my lime tree. Thanks for the help!

Hmmm The only way you would have rootstock fruit would be from a sprout below the graft union. If you follow the branch down to where it meets the main trunk, you should see a graft line above it. You want to remove that branch asap.

Still strange that none of the fruit have seed.