A dioecious rhizomatous perennial herb of moist, fertile, often alluvial, soils by watercourses, in wet meadows, marshes, flood plains and copses, and on roadsides. It spreads mostly vegetatively from rhizome fragments. Female plants are frequent only in N. and C. England. Male-only colonies are probably single clones, many perhaps from deliberate plantings for a source of pollen and nectar for hive bees (Stevens, 1990). 0-380 m (near Garrigill, Cumberland).
The distribution of P. hybridus is little changed since the 1962 Atlas. Although many populations may be alien, they are rarely recorded as such.
European Temperate element.
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.
Atlas text references
Atlas Supp (72a)
1988. Comparative Plant Ecology.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1992. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 3. 2 vols.
1968. Critical supplement to the Atlas of the British Flora.
1947. The distribution of sexes in Butterbur. North Western Naturalist. 22:111-114.