Alisma lanceolatum
Tracheophyta
›Magnoliopsida›Alismataceae›Alisma›Alisma lanceolatum
Ecology
An emergent perennial herb, found in shallow water or on exposed mud at the edge of a wide range of water bodies, although in many areas it is particularly frequent in canals. It is most frequent in eutrophic, calcareous water and rooted in a fine substrate. Lowland.
Status
Native
Trends
A. lanceolatum was not consistently recognised by British botanists as a distinct species until 1952, so distributional trends are difficult to assess. It might still be overlooked as A. plantago-aquatica, but the map may also include erroneous records as narrow-leaved plants of that species are sometimes mis-identified as A. lanceolatum.
World Distribution
Eurosiberian Southern-temperate element.
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Broad Habitats
Standing water and canals
Light (Ellenberg): 8
Moisture (Ellenberg): 10
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 7
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.7
July Mean Temperature (Celsius): 16
Annual Precipitation (mm): 757
Height (cm): 100
Perennation - primary
Perennial
Life Form - primary
Perennial hydrophyte (perennial water plant)
Woodiness
Herbaceous
Clonality - primary
Little or no vegetative spread
Count of 10km squares in Great Britain: 464
Count of 10km squares in Ireland: 41
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: 0.38
Weighted Changed Factor: 12
Weighted Change Factor Confidence (90%)
60
JNCC Designations
NBNSYS0000002102
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