Ranunculus sceleratus var. multifidus

Cursed crowfoot is a fast-growing wetland perennial that thrives in consistently moist to waterlogged soils along pond edges, streams, or bog gardens. It prefers partial shade and cool conditions, making it suitable for naturalized water garden plantings in cooler climates. Note that all parts of this plant are caustic and irritating if handled or ingested, so use gloves when planting.