Anemone hepatica

otherwise known as common hepatica, liverwort, liverleaf, kidneywort or pennywort growing in the reserve near us.
They aren't quite as lush this year but still plenty. They are a promising sign of spring.

From wikipedia I discovered that contact with all wounded plants of the buttercup family of which this is a member, causes itch, rashes or blistering on contact with the skin or mucosa. Ingesting the toxin can cause nausea, vomiting, dizziness, spasms, acute hepatitis, jaundice, or paralysis! The toxic protoanemonin, the lactone of 4-hydroxy-2,4-pentadienoic acid is released. When this toxin comes into contact with air it dimerizes to anemonin, which is further hydrolyzed to a non-toxic dicarboxylic acid. Medieval herbalists believed it could be used to treat liver diseases, and may still be used in current folk medicine... I'll resist the temptation.