Physocarpus opulifolius (L.)Maxim. Roasaceae Distribution: North America. Austin () reported it was used for gynaecological problems by the Iroquois and Menomini

and the root as an emetic by the Ojibwa and for treating gonorrhoea, tuberculosis and as a laxative (tribes in western USA). Plants are toxic. Photographed in the Medicinal Garden of the Royal College of Physicians, London.