At the end of last year’s season, the gardeners at the Botanic Gardens here in Cambridge cut down the sodden, sagging leaves and piled them on the spot where the plant had been. The reason I am telling you this is because what you see here is entirely this year’s growth. Pretty astounding, eh?
By the way, the Latin name is Gunnera manicata, and according to the Garden guide it originated in Chile. Wikipedia says it originated in Brazil, hence Brazilian Giant-Rhubarb.