The arrival of agriculture in pre-Hispanic times was the origin of the patchy landscape of pastures and farms that now dominates the eastern and northern coast of Chiloé Island. Some native plants like "Gevuina avellana" and "Fascicularia bicolor" have edible seeds, and others like the Chilean rhubarb have edible stems. The most notable edible plant native to Chiloé is the potato ("Solanum tuberosum"), which contrary to the Andean potatoes of Peru and Bolivia is adapted to the long-day conditions prevalent in the higher latitudes of southern Chile. Hundreds of varieties of this potato have been cultivated by local indigenous peoples since before the Spanish conquest, and historical and molecular evidence suggests that it is the progenitor of the world's most widely cultivated variety of potato, "S. tuberosum tuberosum".