A variable species which occurs in a wide range of still or slowly flowing waters, which may be base-rich or base-poor, oligotrophic, mesotrophic or eutrophic, and exposed or sheltered. P. berchtoldii is sometimes found in brackish sites, but is usually replaced in such habitats by P. pusillus. 0-710 m (Lochan nan Cat, Mid Perth).
Until 1938, P. berchtoldii was confused with P. pusillus in our area. It is under-recorded by botanists who neglect linear-leaved pondweeds but may be over-recorded by others who fail to distinguish P. pusillus. Changes in its distribution are difficult to assess.
Circumpolar Boreo-temperate element.
Perennation - primary
Life Form - primary
Clonality - primary
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 of north European vascular plants north of the Tropic of Cancer. 3 vols,
, Königstein, (1986)
Pondweeds of Great Britain and Ireland. Botanical Society of the British Isles Handbook no. 8,
, London, (1995)
Aquatic plants in Britain and Ireland,
, Colchester, (1997)