S. jamesii is the only wild potato species that is primarily found in the United States. It is native to the American SW, particularly the four corners region. Plants range considerably in size, from very small, low growing varieties to almost the same stature as domesticated potatoes. Like most wild potato species, S. jamesii is not really edible. It was eaten by native Americans, but reportedly by also consuming clay, which moderated the absorption of the toxic glycoalkaloids.
S. jamesii is tricky to use for breeding with the domesticated potato. It is a diploid with an endosperm balance number of 1, which means that a bridge species must be used to cross to S. tuberosum. Our wild potatoes are not fully isolated, so while most of the seeds will be purely S. jamesii, some may be crossed with other wild potatoes.
25 seeds collected from mixed varieties or 3 tubers. The tubers may be of more than one variety or all the same.
You can read more about S. jamesii in our Wild Potato Guide.