Dutch iris (Iris × hollandica) is a hybrid bulbous iris. Its name does not reflect its place of origin but rather the Dutch people who hybridized it. Iris xiphium, the parent species associated with the Dutch iris comes from Spain and Portugal. The 3- to 4-inch flowers are usually multi-colored. Blue, bluish-purple, white, bronze, rose, gold and yellow are the most common colors.

https://www.thespruce.com/growing-dutch-irises-5101138