Arachis is a South American genus with 69 species. One species, Arachis hypogaea, is widely cultivated for its edible seeds (peanut, groundnut).
Alonso C. & Herrera C.M. (2001) rbcL and legume phylogeny, with particular reference to Phaseoleae, Millettieae, and allies. Syst. Bot. 26: 515-536.
Krapovickas A., Gregory W.C., Williams D.E. (transl.) & Simpson C.E. (transl.) (2007) Taxonomy of the genus Arachis (Leguminosae). Bonplandia 16 (suppl.): 205 p.