Callitriche hamulata s.l.
These perennial herbs grow in both deep, still water and fast-flowing rivers, particularly in acidic, oligotrophic water. They may be annual in temporary water bodies, such as pools, ditches and reservoir edges. 0?915 m (Sgurr na Lapaich, Easterness).
As in the 1962 Atlas, this map combines records for C. hamulata and C. brutia, but the broadly defined species is much better recorded now. So many records are referable to C. hamulata sens. lat. that a reliable map of C. hamulata sens. str. cannot be produced. There is also doubt over the taxonomic separation of these two species.
C. hamulata sens. lat. has a European Wide-temperate distribution; it also occurs in Greenland and as an alien in Australasia.
Atlas Change Index: 1.12
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.