Is it a rhyzomatous Iris near the reticulatas?. How long is it that you have it? The picture is very beautiful too!
Arturo

Hello, Arturo!
This iris has been growing for me for a year and a half. This plant is native to Siberia. It grows in meadows and edges, it likes partial shade light. It has a creeping thin rhizome. It has nothing to do with reticulatas (which have bulbs). Stable in culture. I have two other color forms, but they have not yet grown and bloomed

Thank you Serjio, its good that you were able to grow it! I assume that you started it from seed. Or is it a plant from your friend Oleg B ?. It is very interesting about its life habit: dappled shade! Not that many irises are forest dwellers. Some of them are from N.America like I.hartwegii. In my view a very interesting trait to bring into cultivation. Most of modern gardens are very soon in shady conditions. With roses there are quite a few that are shade tolerant, so that is something to be searched in iris horticulture as well.
Arturo

Yes, this is an iris that I got in the form of a rhizome. Yesterday, the second iris from this section bloomed- Iris uniflora. I'll upload the photo soon. There aren't really many differences between them.