Avocado History: On May 15, 1915, in the posh new Hotel Alexandria in Los Angeles, a cadre of California farmers gathered to decide the fate of a new crop. The ahuacate, a pebbly-skinned, pear-shaped fruit, had been a staple food in Mexico, and Central and South America since 500 B.C. In the 16th century, Spanish conquistadors fell in love with the fruit after observing its prized status among the Aztecs. Until the early 1900s, this fruit had never been grown commercially in the United States. By 1914, however, hotels in Los Angeles and San Francisco were ordering as many of these fruits as they could and paying as much as $12 for a dozen. The avocado was known as an alligator pear, because of the shape, green skin, and rough texture of the Hass variety. (The Florida avocado has a shiny, smooth surface.) But the farmers came up with a new name: avocado. Today, California accounts for nearly 90 percent…