Nicknamed the "Land of Opportunity," Arkansas, which joined the Union in 1836, was the 25th state. The early French explorers of the state gave it its name, which is probably a phonetic spelling for the French word for "downriver" people, a reference to the Quapaw Indians and the river along which they settled. Arkansas is the only state in which diamonds have been mined, although today the mine operates only as a tourist attraction. The state flower is the apple blossom.