I do recall that way back, about 1987, or so, I had sown a packet of store bought poppy seeds off the rack. One, appeared to be an Iceland poppy, with the typical leaves being round, or "lobed" at the ends. I thought nothing of it, until it grew about four feet tall, on a main stem, then flowered profusely with blooms like a corn (rhoeas) variety. But it was sterile, as I did try to pollinate it. Every single capsule, was barren. So, therefore since I didn't actually create the inter-generic hybrid, I figured it could be duplicated. Then with the info read online many years later & having some idea about L. Burbank ( & Johnny Carson used to crack jokes about 'Down town Burbank) that I would try a very similar experiment. ( Of course, I was aware of (De Welt's?) hybrid Orientals, but had never gotten around to ordering them, until I found out, they had already been sold, off to an English grower ( Sandy Worth? of a large collection of P. orientale cv.'s. .Not many cultivars are available, here in the U.S. But did manage to get one of her creations, called 'Medallion' via Burpee, though if it had ever bloomed, I missed out seeing it happen. Quite a few years later, I decided to move it to my apartment ( it was in a rather large pot) but needed division badly & then suddenly rotted, before I could divide the crown..