An upright perennial herb which is naturalised in damp woodland and in ditches and by streams, often in its flore pleno form. It also occurs as a casual. Lowland.
This species was known in cultivation by 1596, and was formerly popular as a cottage garden plant but is now infrequently grown. It was recorded in the wild in 1924 (S. Lincs. and N. Aberdeen), but remains rare in the wild.
Native of C. Europe.
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