Apium nodiflorum (Fool`s-water-cress)
Summary
Summary 
Ecology
A perennial herb, found in shallow water in streams, ditches, swamps and marshes, and on seasonally exposed mud at the edges of ponds, lakes, rivers and canals, sometimes scrambling into nearby vegetation. It is characteristic of nutrient-enriched sites. Generally lowland, but reaching 335 m E. of Shap (Westmorland).
Status
Trends
The distribution of this species is stable. It was mapped as `all records` in the 1962 Atlas. There has been confusion between this species and Berula erecta, particularly in S. Scotland where some of the older records may be erroneous.
World Distribution
Eurosiberian Southern-temperate element; widely naturalised outside its native range.
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© K.J. Walker, BSBI
Photos
Photos
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Apium nodiflorum© K.J. Walker, BSBI
Maps
Maps
NBN Hectad Map
BSBI Hectad Map
BSBI Tetrad Map
New Atlas
Habitats
Habitats
Broad Habitats
Light (Ellenberg): 7
Moisture (Ellenberg): 10
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 7
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 4
July Mean Temperature (Celsius): 15.2
Annual Precipitation (mm): 961
Life Form
Life Form
Height (cm): 60
Length: 100
Perennation - primary
Perennation - secondary
Life Form - primary
Life Form - secondary
Woodiness
Clonality - primary
Clonality - secondary
Distribution
Distribution
Count of 10km squares in Great Britain: 1661
Count of 10km squares in Ireland: 855
Count of 10km squares in the Channel Isles: 12
Atlas Change Index: -0.31
Weighted Changed Factor: 14
Weighted Change Factor Confidence (90%)
Conservation Status
Conservation Status
Plantatt Conservation Status
JNCC Designations
Other Accounts
Other Accounts
References
References
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 (158d)
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1988. Comparative Plant Ecology.
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1997. Aquatic plants in Britain and Ireland.
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1980. Umbellifers of the British Isles. Botanical Society of the British Isles Handbook no. 2.
