Watermelon

A watermelon, accurately named.

A watermelon is about 92% water and is botanically a berry, and some are grown square on purpose.

Sandwich

A sandwich, named after an earl, named after a town.

The sandwich is named after the 4th Earl of Sandwich, who was named after a town that has no sandwich.

Ketchup

Ketchup, no longer sold as medicine.

In the 1830s tomato ketchup was sold as a medicine, in pill form, for indigestion.

Chocolate

Chocolate, formerly legal tender.

Cacao beans were once used as money in Mesoamerica, so chocolate literally grew on trees.

Apple

An apple, about a quarter air.

Apples float because about a quarter of an apple is air, which is why nobody bobs for potatoes.

Tomato

A tomato, legally a vegetable.

Botanically a tomato is a fruit, but in 1893 the US Supreme Court ruled it a vegetable.

Potato

A potato, terrestrial for now.

In 1995 the potato became the first vegetable ever grown in space.

Pineapple

A pineapple, about two years in the making.

A pineapple takes up to two years to grow, and it contains an enzyme that gently digests you back.

Peanut

A peanut, which is not a nut.

The peanut is not a nut; it is a legume whose flowers bury themselves underground to grow the pods.

Carrot

A carrot, orange since the 17th century.

Carrots were originally purple or yellow; orange carrots became common in the Netherlands in the 1600s.