First of all, thank you for beautiful and interesting pictures, Josef!
Second, I think best way to find Pulsatilla integrifolia seeds is to become friendly with someone who grows it, or check the seedlists. The Swedish list has offered it several times. I fear it is quite unlikely to find it in a commercial list?
My question is; does anyone know for sure if there are P wallichiana plants/ seeds around or is it just a confusion with P campanella? As far as I have understood, the wallichiana is if not totally extincted at least almost?
Third... I am now a little ashamed having showed how lazy I am not tidying up in my garden. I thought I had found a very good and clever excuse for it. Regarding small slugs, I have millions of them an it does not really matter if I tidy up some of the plants or not. I have most of the Hepaticas under an old apple tree, and when I unpatiently look under the leaves in springtime there is not only Hepatica buds but a happy snail nursery as well. But somehow, it does not seem to harm the Hepaticas, or actually, anything else but some Hostas that has sometimes gotten a decorative hole or two...or five...