Hello Arthur,
You're right, this is not a variant of Natasha. Pictures of plants in my garden is doing wrong my friend and signatures. I gave the photo on a forum without identification. Iris reticulata Natasha variation from the garden will bloom like. Of course, Natasha has whitish flowers and petals narrow. In the picture is mistakenly signed one of my seedlings. Iris reticulata varieties sown worth it because it is easy to cross.
Arthur thank you very much for the correction. In return, I will try to send you have any interesting seeds. Regards kot
Sorry for the english with google translate
Crocus biflorus