Ranunculus aconitifolius

Ranunculus aconitifolius, the aconite-leaf buttercup or bachelor's buttons, is a species of flowering plant in the buttercup family Ranunculaceae, native to central Europe. Growing to high by broad, this herbaceous perennial has slightly hairy palmate leaves up to long, and loose panicles of white, saucer-shaped flowers in spring.
This species forms clumps, sometimes large colonies in moist places in mountains, meadows, edges of ditches and streams.
The Latin specific epithet aconitifolius means “with leaves resembling aconite”, a reference to the related genus Aconitum, the monkshoods.
The double-flowered cultivar R. aconitifolius 'Flore Pleno' has gained the Royal Horticultural Society's Award of Garden Merit.