A most beautiful and rare Pulsatilla species, similar and often confused with another beauty: P. turczaninovii.
Dark violet (rarely pink) bell shaped violet flowers. Exquisite.
Germination: best sown fresh or in late fall/winter; most sources recommend -/+ 15C for germination in 3-6 months.
You can read a lot more about Pulsatillas species/propagation in the Scottish Rock Garden forum.