Delicate woodland plant native to eastern North America. To 9 inches high and up to 1 feet wide, with finely divided leaves resembling those of meadow rue (Thalictrum). Loose clusters of inch-wide, white (usually) or pink flowers appear in early spring. Attractive for close-up viewing. Selection known as either 'Rosea Plena' or 'Schoaff's Double Pink' has long-lasting, fully double pink flowers like tiny roses. 'Cameo' has double white blooms. Those of 'Betty Blake' are double, light green. Deer resistant.