Here's another recent close-up of RE3 (Veiny Rebloomer) from Iris cengialtii X CLOWN PANTS. This is the third year of rebloom, and this year it started in early September and is still in bloom now (early November).
Not too shabby for being only a generation or two from the species irises.
CLOWN PANTS is Iris variegata X Iris suaveolens var. mellita
This one and its siblings are probably a little too big to be classed as MTBs, but they are fully interfertile with the old-fashioned diploid type MTBs. They don't really fit with the Intermediate Beardeds. So I'm still wavering on whether to register them as Border Beardeds or SPECIES-X.