Lythrum hyssopifolium

Tracheophyta MagnoliopsidaLythraceaeLythrumLythrum hyssopifolium


An annual of disturbed ground which is flooded in winter, including hollows and ruts in arable fields, and damp pastures disturbed in winter by numerous waterfowl. It sometimes occurs as a casual from seeds introduced with grain or from other sources. Lowland.



World Distribution

As an archaeophyte L. hyssopifolium has a Eurosiberian Southern-temperate distribution; it is widely naturalised outside this range.

Broad Habitats

Arable and horticultural (includes orchards, excludes domestic gardens)

Light (Ellenberg): 8

Moisture (Ellenberg): 6

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 4


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.9

July Mean Temperature (Celsius): 16

Annual Precipitation (mm): 777

Life form information

Height (cm): 15

Perennation - primary


Life Form - primary

Therophyte (annual land plant)



Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 112

Count of 10km squares in Ireland: 3

Count of 10km squares in the Channel Isles: 8

Atlas Change Index: -1.12

Distribution information

Plantatt Conservation Status


JNCC Designations


PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.

Atlas text references

Atlas (143a)
Callaghan DA
1998.  Biological Flora of the British Isles. No. 203. Lythrum hyssopifolia L. Journal of Ecology. 86:1065-1072.
Meusel H, Jäger E, Rauschert S, Weinert E
1978.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.
Wigginton MJ
1999.  British Red Data Books. 1. Vascular plants, edn 3.