Iris is defined in the dictionary as "any plant of the genus Iris, having showy flowers and sword-shaped leaves." It is also defined as "a rainbow" . It seems most appropriate that rainbow is included in definition because the iris comes in many colors and kinds.
There are for example German irises, Dutch irises, and the Louisiana iris. The Louisiana Iris is the only one of this list suitable for growing in water or a wet area. It also thrives in soil. At Louisiana Iris Farms we specialize in only the Louisiana Iris and there are hundreds of varieties of just this type.