Hello Ken,
I got your message.
They are still young, But I am pretty sure it is Citrus medica or Citron.
That is the fruit that they candy for Fruit Cake and such.
Can also be made into Lemoncello.
The purplish tint to the flowers and faint ribbing is why I think it is that.
You can see more info here:
https://www.hort.purdue.edu/ne...
