It is the principal port of the island, exporting barley, wheat, cotton, raisins, oranges, lemons and gypsum.
Among its natural productions are lemons, citrons, olives, wine and honey; it also exports a considerable quantity of valonia.
Indian corn, quinoa, mandioca, possibly the potato, cotton and various fruits, including the strawberry, were already known to the aborigines, but with the conqueror came wheat, barley, oats, flax, many kinds of vegetables, apples, peaches, apricots, pears, grapes, figs, oranges and lemons, together with alfalfa and new grasses for the plains.
But the strip of coast between the Apennines and the sea, known as the Riviera of Genoa, is not only extremely favourable to the growth of olives, but produces oranges and lemons in abundance, while even the aloe, the cactus and the palm flourish in many places.
The cultivation of oranges, lemons and their congeners (collectively designated in Italian by the term agrumi) is of comparatively modern date, the introduction of the Citrus Bigarcidia being probably due to the Arabs.