Scilla litardierei was S. pratensis

A tiny treasure for spring, will seed about in your rock garden or trough.  Only a few.

Amethyst Meadow Squill This valuable plant is often grown for its star-shaped, amethyst-blue to violet, grape-hyacinth-like flowers, which open in late spring, much later than the more popular Siberian squill, and also the various Muscari which it resembles. They are very easy to grow and naturalise well. 15-20 cm

several in a pot 

Dominicus Johannes Bergsma, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons