Ugli, Citrus reticulata × Citrus paradisi, Grapefruit, Citrus paradisi, and Pomelo, Citrus maxima. From Fruit: A Connoisseur’s Guide and Cookbook by Alan Davidson, 1991. © Charlotte Knox 3rd January 2016 by foxrobins Leave a Comment Ugli, Citrus reticulata × Citrus paradisi, Grapefruit, Citrus paradisi, and Pomelo, Citrus maxima. From Fruit: A Connoisseur’s Guide and Cookbook by Alan Davidson, 1991. © Charlotte Knox