Zencat said:Here's my Rheingauperle for comparison.
@Zencat
I was going through iris listings last night and came across Rheingauperle and thought that was a very likely candidate, so I'll be a little surprised if it isn't. How big is Rheingauperle? I'll try to measure mine accurately today to try and help solve the mystery.
(Again, considering the lady was giving away large chunks of this for free to a bunch of people--she had probably 1/4 truckload of it--at a local plant swap, I don't suspect it's a newer or fancier iris... It's likely to be something common that has been around awhile.)