earthnut

Earthnut is a common name that can refer to several different plants, most notably those producing edible underground tubers or nuts. The term is often used interchangeably with peanut, though peanuts (Arachis hypogaea) are technically legumes, not nuts, and grow above ground before their pods mature underground. When "earthnut" refers to peanuts, it highlights their subterranean growth habit. However, the name also commonly applies to various species of Apiaceae, such as Bunium bulbocastanum, also known as pignut or kippernut. These plants produce small, edible tubers that have been consumed historically in some regions, particularly in Europe. The taste and texture of these tubers can vary, often described as nutty or starchy. Another plant sometimes called earthnut is Apios americana, or groundnut, a vine that produces edible tubers and edible seed pods. The usage of "earthnut" is therefore context-dependent and can lead to confusion if not specified further.