Duncan - The original seedling from which the Duncan was established was found in the old Snedicor or Davy grove near Safety Harbor on Florida, Pinellas peninsula. It lived to be nearly 100 years old.  The seed from which the Duncan was grown came from a tree planted by Count Philippe about 1825.  The Variety was propagated and first named and distributed by A.L. Duncan of Dunedin, Florida about 1892.  It has been successfully introduced into all countries that grapefruit is grown in today.  It is a preferred variety in processing because of the firmness of the flesh.