Q.Pictures Of Blue Flag And Siberian Iris For Comparison
it would be very helpful to have a picture of blue flag and siberian iris to compare because the description does not give enough information to clarify the difference because the flag iris also has a sword looking leaf

Certified GKH Gardening Expert
Here you go:
https://www.gardeningknowhow.com/ornamental/bulbs/iris/growing-siberian-iris.htm
https://www.gardeningknowhow.com/ornamental/bulbs/iris/growing-flag-iris-plants.htm
https://hgic.clemson.edu/factsheet/rain-garden-plants-iris-versicolor-and-iris-virginica/
https://hgic.clemson.edu/factsheet/rain-garden-plants-iris-sibirica/