Juncus subnodulosus

Tracheophyta MagnoliopsidaJuncaceaeJuncusJuncus subnodulosus


A strong, rhizomatous perennial herb growing in dense stands in fens, marshes, wet meadows, ditches and by water, usually in more base-rich conditions than any of the other jointed-rushes (sect. Septati); it also sometimes occurs in brackish water. Lowland.



World Distribution

European Southern-temperate element.

Broad Habitats

Fen, marsh and swamp (not wooded)

Light (Ellenberg): 8

Moisture (Ellenberg): 9

Reaction (Ellenberg): 8

Nitrogen (Ellenberg): 4


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.9

July Mean Temperature (Celsius): 15.5

Annual Precipitation (mm): 838

Life form information

Height (cm): 120

Perennation - primary


Life Form - primary




Clonality - primary

Rhizome shortly creeping

Distribution information

Count of 10km squares in Great Britain: 680

Count of 10km squares in Ireland: 224

Count of 10km squares in the Channel Isles: 2

Atlas Change Index: 0.15

Weighted Changed Factor: 0

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 (321a)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Meusel H, Jäger E, Weinert E
1965.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
Richards & Clapham (1941e)