History of the "Navel"
The original navel orange was discovered growing as a mutation on a sweet orange tree in Brazil in 1820. Seedlings were brought to California in 1873 and in 1878 a navel tree produced its first fruit. In a few short years, the navel orange grew from one tree to millions of trees out of near obscurity. It is one of the most popular varieties in the world, second only to the Valencia orange. The navel orange is a ubiquitous orange variety. It has the quintessential orange color, smooth but pebbled and easy-to-peel skin with a trademark "belly button" at its stem end.