Callitriche obtusangula
Tracheophyta
›Magnoliopsida›Callitrichaceae›Callitriche›Callitriche obtusangula
Ecology
A perennial herb typical of permanent, still or slow-flowing mesotrophic to eutrophic waters, extending into brackish water in coastal grazing marshes. It also grows in a terrestrial form on wet mud as water levels drop. Lowland.
Status
Native
Trends
C. obtusangula was under-recorded for the 1962 Atlas. There is no evidence of any genuine change in its distribution.
World Distribution
Suboceanic Southern-temperate element.
© S. Hammonds
Notts
© S. Hammonds
Broad Habitats
Light (Ellenberg): 7
Moisture (Ellenberg): 11
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 6
Salt Tolerance (Ellenberg): 1
January Mean Temperature (Celsius): 4.1
July Mean Temperature (Celsius): 15.7
Annual Precipitation (mm): 840
Length: 60
Perennation - primary
Perennial
Life Form - primary
Perennial hydrophyte (perennial water plant)
Woodiness
Herbaceous
Clonality - primary
Irregularly fragmenting (mainly water plants)
Count of 10km squares in Great Britain: 757
Count of 10km squares in Ireland: 157
Count of 10km squares in the Channel Isles: 4
Atlas Change Index: 1.35
Weighted Changed Factor: -42
Weighted Change Factor Confidence (90%)
45
JNCC Designations
NBNSYS0000003618