Arachis cardenasii Krapov. & W.C. Greg. is a wild peanut relative native to Bolivia. It has been used by peanut breeders and geneticists in interspecific hybrids with cultivated peanut (A. hypogaea) as a source of pest and disease resistance, e.g., resistance to early leafspot, Cercospora arachidicola . A. cardenasii is a diploid species in the "A-genome" group of Arachis, similar to A. duranensis, which contributed one of the two subgenomes to tetraploid cultivated peanut.
Distribution of Arachis cardenasii collections on a world map.

More at: Encyclopedia of Life
Southwest Environmental Information Network (SEINet)
Germplasm accessions are available at GRIN Global and Genesys.