Samolus valerandi
Tracheophyta
›Magnoliopsida›Primulaceae›Samolus›Samolus valerandi
Ecology
A deciduous short-lived perennial found in small colonies by permanently wet and often seasonally flooded springs, flushed sea-cliffs, puddles, ditches, lagoons and lake shores. It is limited to very open mesic, often calcareous or somewhat saline soils. Populations are often impermanent, colonising the small and transient specialised habitats which change as spring lines and water levels shift. Individuals are usually monocarpic, but may take several years to flower. Lowland.
Status
Native
Trends
This species was mapped as `all records` in the 1962 Atlas. Analysis of the database reveals that most of the losses, which tend to be inland and may result from drainage, have taken place since 1950.
World Distribution
Circumpolar Southern-temperate element.
vc64, Staveley
© Shannon, P
vc64, Staveley
© Shannon, P
vc64, Staveley
© Shannon, P
Broad Habitats
Fen, marsh and swamp (not wooded)
Light (Ellenberg): 8
Moisture (Ellenberg): 8
Reaction (Ellenberg): 8
Nitrogen (Ellenberg): 5
Salt Tolerance (Ellenberg): 2
January Mean Temperature (Celsius): 4.3
July Mean Temperature (Celsius): 15.1
Annual Precipitation (mm): 1013
Height (cm): 45
Perennation - primary
Perennial
Life Form - primary
Hemicryptophyte
Woodiness
Herbaceous
Clonality - primary
Little or no vegetative spread
Count of 10km squares in Great Britain: 845
Count of 10km squares in Ireland: 411
Count of 10km squares in the Channel Isles: 12
Atlas Change Index: -0.42
Weighted Changed Factor: 24
Weighted Change Factor Confidence (90%)
37
JNCC Designations
NBNSYS0000003947