The iris is a garden variety of the Iris ensata. Flower bloom about June,
and there are white, peach, purple, blue, yellow a lot. There are 5,000
kinds including combinations.
A custom to refer an iris to "Iris" as a generic name of irises
is frequent. On the other hand, it may refer it to "Sweet flag",
but a sweet flag used for sweet-flag baths is a plant of the another kind classified in sweet flag department (old
satoimo department).