Finally, in 1990, he identified an offender: an allergenic protein named Ara h 1, after the Latin name for the peanut: Arachis hypogaea.

In some Leguminosae, as Arachis, Cathartocarpus Fistula and the tamarind, the fruit must be considered a legume, although it does not dehisce.

Arachis oil enters largely into the composition of Marseilles White Soaps.