Propagation of 'Star Ruby' in Florida peaked during the 1984-85 season and has since declined, presumably because of cultural problems associated with this cultivar. Thompson, ' aka 'Pink Marsh,' arose as a limb sport of 'Marsh' near Oneco, Florida. In 1924, 'Thompson' was introduced by a local nursery and, being the first pigmented seedless grapefruit cultivar, became quite popular. Fruit characteristics are essentially identical to 'Marsh,' except the pink flesh color. Sugar and acid levels may be lower than 'Marsh,' but not meaningfully so.
Fruit hold well on the tree, but flesh color fades as the season progresses.
Cultivars Resembling Grapefruit ' Triumph ,' also called 'Early Triumph,' originated as a seedling on the grounds of the Orange Grove Hotel in Tampa, Florida. The 'Triumph' fruit is quite seedy and somewhat rounder in shape than most standard grapefruit cultivars. It is white fleshed and of exceptionally high quality. Its lack of typical grapefruit bitterness and its apparent immunity to sour orange scab indicates that it is not a true grapefruit. The flavor suggests that it could be either a mutant resembling the pummelos or shaddocks or a hybrid.