Hey Patrick, Maybe Ned or Keith Endres can help me out here. They were with me when we visited with Mr Bob Zendher in Summerville, SC a couple of years ago. It was there that I first saw and tasted the Dunstan Honey Orange. If my memory serves me correctly, He said that he obtained it from Major Collins in Tifton Georgia. Major Collins had obtained the tree from Doctor Dunstan of Florida who was trying to develop more cold hardy citrus after some of the damaging freezes had killed back much of the mainstream citrus types. I may be wrong but I believe that his family ( Dr Dunstans) has continued to operate in the nursery business and now is called Chestnut Hill Nurseries. A search engine should bring them up. I dont think they carry the Dunstan honey orange so there are just a few survivors of this strain scattered around the Southeast. Im glad Ned, Keith and myself were able to meet Mr Zendher and get some budwood from this tasty cultivar. Im not sure if there is any trifoliate in its parentage or not. There is no evidence of trifoliate in the leaf patterns. Just my remembrances of our conversation that Sunday afternoon a few years ago.