Myosoton aquaticum

Tracheophyta MagnoliopsidaCaryophyllaceaeMyosotonMyosoton aquaticum


This perennial herb usually grows in damp or wet habitats, including damp woods, Alnus and Salix carr, the banks of rivers, streams, canals and ditches, by ponds and in marshes and other wet places. It has been recorded on newly surfaced forestry rides, and can also tolerate occasional flooding by brackish water. Lowland.



World Distribution

Eurosiberian Temperate element; also in E. Asia and widely naturalised outside its native range.

© P. Shannon

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 8

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 8


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 16

Annual Precipitation (mm): 747

Life form information

Height (cm): 100

Perennation - primary


Life Form - primary


Comment on Life Form

Best treated as hemicryptophyte; it dies back to prostrate overwintering stems



Clonality - primary

Shortly creeping and rooting at nodes

Distribution information

Count of 10km squares in Great Britain: 927

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 0

Weighted Changed Factor: 8

Weighted Change Factor Confidence (90%)


Distribution information

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 (69c)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1983)