Thanks Brian, if it is triploid and var alpinus diploid, the crossing may be very difficult if impossible (I'm waiting for the new edition for the "bible" so that's why I don't have it).
My G.alpinus var bortkewitschianus has flowered every year since I got it so that is good.
I'm hoping that Bondarenko's G.caucasicus/G.alpinus starts to multiply, it looks like a nice form with flower way above the foliage and late flowering is a bonus here.