Photographs: Lissarda, Co.Cork
Unscented pale pink-lilac flowers appear on stout stalks before the leaves.
Dioecious, male flowers (illustrated) are larger than female.
Very large, toothed, rounded heart-shaped leaves, grow to 1m. diameter.
Mainly spreads vegetatively from fragments of rhizomes. Height: 20-75 cm.
Damp, fertile soils. Roadsides, riversides, wet meadows, open woodland.