Thanks
@tveguy3 @Lestv and
@Caitlinsgarden , I think it might be Tristram! Another ATP member has offered to send me a piece of her Tristram for comparison sake. I love this website, or more accurately the great gardeners on this site!
@Lestv, the plant is actually taller. I initially measured the stand I have growing along our driveway. The soil there is not great, it gets hot & dry from the blacktop. I measured my second stand growing in better conditions & the iris is taller, more like 27".
