Grapefruit is the citrus fruit of the grapefruit tree (Citrus × paradisi), an 18th-century hybrid first bred in Barbados. The fruit is yellow-orange skinned and largely an oblate spheroid; it grows to about 10–15 cm (4–6 in) in diameter. The flesh is segmented and acidic, varying in color depending on the cultivars, which include white, pink and red pulps of varying sweetness (Ruby Red variety shown here).