I wonder if anyone has an idea what cultivars any of these might be? These are from my orange tree that is 50-60 years old. Some may be older varieties or suckers that now produce. There are 2 varieties from 3 main branches.

The Navel orange:

The other Orange:

Sweet or sour ? Sour orange was one of the main root stocks years ago. Look for the difference in the leaves.

I don't see any big differences in the leaves from one type to the other. The petioles are about the same size. The non-Navel Orange can have thorns that are 2 inches or longer in length. The seeds are polyembrionic.