The peanut, also known as the groundnut is a legume(マメ科商物)crop grown mainly for its edible seeds. It is widely grown in the tropics and subtropics. It is classified as both a grain legume and an oil crop. Atypically(型にはまらずに、不規則に)among crop plants, peanut pods(さや)develop underground rather than aboveground. (https://en.wikipedia.org/wiki/Peanut)