Potato
The potato (pl. potatoes), also called Irish potato or white potato, is one of humanity's most important foods. It is the root of an herbaceous plant (Solanum tuberosum) that originally evolved in the northern Andean highlands.
The potato was cultivated by various Andean civilizations for at least 2000 years before the Spanish were introduced to it by the Incas in the 16th century. During that time, many different varieties were developed by the Andean peoples, but it was mainly the common white potato that was brought to Europe for cultivation. The potato became a staple crop across northern Europe, but nowhere so much as in Ireland, where an epidemic of potato blight in 1845-46 produced a famine that killed a million or more people and forced as many to emigrate.
The great diversity of potatoes developed in the Andes has been expanded even further around the world, so that there are varieties suited to nearly every climate, with harvest times anywhere from midsummer to late fall. Most prefer a well-drained, slightly acid soil, and are planted in the early spring.
Potatoes also come in a wide range of colors, with skin anwhere from brown to purple to red and white, yellow, red, or blue flesh. They are eaten fried, baked, mashed, boiled, or made into flour, and different varieties have been developed for each of these specific purposes.