help id this lemon
I could use some help ID'ing this lemon, and by extension the tree it came from. We live in Encino CA, and are not sure whether we have an old tree that's gone "bad" or some species we not familiar with.
All the fruits are hollow in the center and very thick skinned compared to store bought lemons. (see pic) As far as taste, its very mild, not very sweet or sour.
The tree is very thorny. The tree's newer branches seem to be growing longer (1 inch ) thorns. So part of this research is for figuring a pruning strategy.
Here is a link that might be useful: lemon picture