New sweet orange?

[850FL]

What is this variety? They are labeled "sweet orange".
They either have sour orange in them, by the thorns.. or maybe have trifoliate, since I did see a single bi-leaf on one of the trees.
Either way they must be a rootstock hybrid? None are grafted or labeled as grafted.. the black mark on the trunk was just where tape was (not a graft).
I hope they are not just a sour orange variety mislabeled!

[850FL]

starting to think they are probably a trifoliate hybrid not SO..