Perennial herb to 1 m tall. Leaves oblong-ovate, to about 20 cm long, blunt-tipped, the base heart-shaped. Leaf stalks of basal leaves longer than leaf blades. Flower clusters close together, without a leaf at the base of each and consisting of about 15-40 flowers; summer.

Europe, SW Asia

Naturalised in Victoria, New South Wales, Tasmania and South Australia. Noxious in Western Australia and Tasmania.

Source: Spencer, R. (1997). Polygonaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.