Do You Know: Why is grapefruit so called? (colour litho)

Why is grapefruit so called? Grapefruit often grows in bunches, and somewhat resembles huge grapes; this is stated to be the reason for its name. Pear-shaped varieties of the fruit are known as Shaddocks. Unknown in a wild state, it is believed to be a native of Polynesia, and fruits may weigh up to 14 lbs. It has long been used as a dessert fruit, but more and more extensively since about 1900, when cultivation was introduced into Florida and California. Grapefruit is now grown in British Dominions, chiefly the West Indies and South Africa. Illustration for one of a set of 50 "Do You Know?" cigarette cards issued by Carreras in 1939.