Hypericum perforatum

Tracheophyta MagnoliopsidaClusiaceaeHypericumHypericum perforatum

Ecology

A variable, rhizomatous perennial herb of meadows, hedge banks, open woods, roadsides and along railways. It often grows in drier, more ruderal and more calcareous habitats than H. maculatum. It reproduces by seed and also sometimes by root buds. 0-480 m (Great Rhos, Rads.), with an exceptional record at 845 m (Great Dun Fell, Westmorland).

Status

Native

World Distribution

Eurosiberian Southern-temperate element; widely naturalised outside its native range.

© H. Higgins, IWNHAS

Broad Habitats

Calcareous grassland (includes lowland and montane types)

Light (Ellenberg): 7

Moisture (Ellenberg): 4

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 15.1

Annual Precipitation (mm): 951

Height (cm): 80

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Rhizome far-creeping

Clonality - secondary

Clones formed by suckering from roots

Comment on Clonality

root-budding mainly in shallow soils (CPE)

Count of 10km squares in Great Britain: 1906

Count of 10km squares in Ireland: 385

Count of 10km squares in the Channel Isles: 6

Weighted Changed Factor: 12

Weighted Change Factor Confidence (90%)

17

JNCC Designations

NBNSYS0000002957

Atlas text references

Atlas (57d)
Crompton CW, Hall IV, Jensen KIN, Hildebrand PD
1988.  The biology of Canadian weeds. 83. Hypericum perforatum L. Canadian Journal of Plant Science. 68:149-162.
Grime JP, Hodgson JG, Hunt R
1988.  Comparative Plant Ecology.
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Meusel H, Jäger E, Rauschert S, Weinert E
1978.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.
Salisbury EJ
1952.  Downs and dunes.