I don't have 'St. Ola', but in googling pics, they do look very much like G.Biokovo. I originally got both from Bluestone, but one or two of the Biokovo turned out to be Karmina, so I've always had a lot more of the magenta color. The white with that subtle pink blush is my favorite, and looks beautiful with everything. They are indeed perfect with any Iris- equally at home in a moist bed with JIs or Siberians, or in a dryer spot with bearded types!
