From The Hardy Citrus of Texas Part 1: After one hundred years, Morton Citrange from Dr. Swingle is still our nearest to edible citrus of any real hardiness, though still quite a distance away from P. trifoliata in this regard. At the latitude of Franklin, halfway from Houston to Dallas, I believe one may be more assured of satisfaction by growing Morton citrange, which has a better flavor to one well-acquainted with it—better than CEI #1, or what would seem to be a too-early harvested grapefruit. It seems quite sour to those requiring sugar on grapefruit, but scoops out clean with little rag or peel bitterness. Morton does produce good pollen, which is often both deficient and defective in conventional citrus, especially Navel orange and seedless kumquat. Morton, however, is a very unpromising female, totally polyembryonic to all my experience.