Congratulation on all these species, David, but especially L. papilliferum.
I suspect that in coming years, they will grow to a more normal size. The 1-1.5 inch size seems to be all the European growers can muster. But unlike theirs, yours is well formed, and all the parts well developed.
This morning I noticed my L. papilliferum seed from the "Starting Lilies from seed" thread had been emerging. Get thee to some sun!
L. papilliferum often wanders underground before popping up in the spring. I've had them explore more than a foot away from the bulb, so be careful with your sping garden cleaning.