Hypericum humifusum
Tracheophyta
›Magnoliopsida›Clusiaceae›Hypericum›Hypericum humifusum
Ecology
A short-lived perennial herb of open well-drained habitats (heaths, dry moors, open woodlands, tracksides, sometimes roadside banks) on light acidic soils; if apparently on calcareous soils, then rooting in a shallow acidic surface layer. Generally lowland, but reaching 530 m at Cat-and-Fiddle, Cheshire.
Status
Native
Trends
Although H. humifusum is widespread, it is always local and rarely more than locally abundant. It was mapped as `all records` in the 1962 Atlas. Analysis of the database reveals that the widespread decline in England and Scotland has occurred since 1950. Losses in W. Ireland are probably due to under-recording.
World Distribution
European Temperate element.
© M. Cotterill, IWNHAS
© M. Cotterill, IWNHAS
heathland
© G. Toone, IWNHAS
heathland
© G. Toone, IWNHAS
heathland
© G. Toone, IWNHAS
Broad Habitats
Boundary and linear features (eg hedges, roadsides, walls)
Light (Ellenberg): 7
Moisture (Ellenberg): 6
Reaction (Ellenberg): 4
Nitrogen (Ellenberg): 3
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.6
July Mean Temperature (Celsius): 14.8
Annual Precipitation (mm): 1085
Height (cm): 10
Perennation - primary
Perennial
Life Form - primary
Chamaephyte
Woodiness
Herbaceous
Clonality - primary
Little or no vegetative spread
Count of 10km squares in Great Britain: 1732
Count of 10km squares in Ireland: 428
Count of 10km squares in the Channel Isles: 12
Atlas Change Index: -0.4
Weighted Changed Factor: 6
Weighted Change Factor Confidence (90%)
25
JNCC Designations
NBNSYS0000002964