By gosh, I do believe you spotted me. I thought for sure it was. But you're right. Do you have any idea of the correct identification? It really is similar to the untrained eye. I apologize.
Name: Suzanne/Sue Sebastopol, CA (Zone 9a) Sunset Zone 15
Oh I am sure it's not IG.
Did it come from a vendor with that label? With over 84,000 registered daylilies, many of them with similar looks, it would be very hard to guess at an ID from a photo.