The species is dioecious, the male and female flowers being borne on separate plants. In Britain, the male flowers are widespread, but the female flowers have a restricted distribution in northern and central England. The flowers are produced in the early spring, before the leaves appear. They are pale pink, with several inflorescences clustered on a stem. The leaves are large, on stout tall stems, round, with a diameter of with petioles up to . It is also called bog rhubarb, Devil's hat, and pestilence wort. Synonyms include P. officinalis, P. ovatus, P. vulgaris, and Tussilago<unk>  L. It is native to central Europe, extending from the British Isles to the Caucasus, and from southern Italy north to southern Scandinavia. It is present as an introduced species in North America. In the British Isles, female plants are rarely found outside central and northern England, and the species may be naturalized as clonal populations outside this area, propagating via rhizome fragments. The preferred habitats are moist, fertile soils, often by rivers, streams and in wet meadows.
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