Wim and Rafa, I sometimes get seed, maybe one year out of three so not very reliable but I'll go out and hand-pollinate now (I have only the one clone so it must be self fertile) and if there is any seed you shall share it. I have to admit though that while it germinates well, I have had trouble bringing it on though the first winter and getting it up for the second time. I find it very easy to divide though and every small division makes a nice new little plant. If you could receive plants, I could do that for you both. Of course you'd have to turn their seasons around.
Just two new flowers out this morning so I've done my best with those. It's a shame each flower only lasts a day, but a good clump makes plenty flowers. I've had as many as 18 out at one time. I also found a first flower out on Lilium oxypetalum v. flavidum, from seed. Pale yellow and lightly speckled with red in the centre, slightly citrus-scented. I'm delighted with it and will take a picture when the sun comes around. (Not an irid of course.