In the sierra region, wheat, barley, oats, quinua (Chenopodium quinoa), alfalfa, Indian corn, oca (Oxalis tuberosa) and potatoes are the principal products.
About the saline lakes and marshes of the prairie country are found Ruppia maritima, L., Heliotropium curassavicum, L., natives of the Atlantic coast, and numerous species of Chenopodium, Atriplex and allied genera.
Above the sea, the indigenous species include the potato, maize, oca (Oxalis tuberosa), and quinua (Chenopodium quinoa), and the exotic species, wheat, barley, oats, alfalfa (Medicago saliva), and most of the fruits and vegetables of the northern temperate zone.
Maize and quinoa (Chenopodium quinoa) were known in Chile before the arrival of Europeans, but it is not certain that they are indigenous.
Among the more important productions, the potato, oca (Oxalis tuberosa), quinoa (Chenopodium quinoa) and some coarse grasses characterize the puna region, while barley, an exotic, is widely grown for fodder.