Unlike many other times when I am guilty of taking a given name for granted, I am certain those are Iris setosa. The seed came from Todd Boland, research horticulturist at St. John's Memorial University of Newfoundland Botanical Garden. And this is pic of Iris setosa I grew from seed collected in the wild near Kenai, Alaska. I think if you google Iris spuria, you'll see they are very different. Iris setosa has almost no standards. Iris spuria does.
Rick Rodich zone 4a. Annual precipitation ~24 inches
near Minneapolis, Minnesota, USA
Iris tectorum f. alba, and a reversion on the same plant.