This grower is sure of this plant identification.
A huge leaved plant, a member of the rubbarb family. It likes a damp location in full sun or part shade.
Gunnera, Chile rhubarb, Giant rhubarb
Gunnera manicata (Gunnera). This is a large perennial plant which is grown for its ornamental foliage and spreading form. It will bear conical green flowering spikes in the summer which are followed by orange seed pods.
You will need to shelter this plant from harsh winter cold. They will prefer a rich, moist soil and are fantastic landscape plant beside a lake.
Foliage, ornamental, bog