Ancestral grapefruit from Southeast Asia – it has mild grapefruit flavor but low bitterness. In a coffee description , this mean a mild and not-so-aggressive citrus flavor, or citric acidityAcidity is a positive flavor attribute in coffee, also referred to as brightness or liveliness. It adds a brilliance to the cup, whereas low acid coffees can seem.... It is clearly citric but more “pink grapefruit” than “white grapefruit” in flavor. Wikipedia states, “The pomelo, pummelo, or in scientific terms Citrus maxima or Citrus grandis, is the largest citrus fruit from the family Rutaceae and the principal ancestor of the grapefruit. It is a natural, i.e., non-hybrid, citrus fruit, native to Southeast Asia.”