Juncus maritimus

Tracheophyta MagnoliopsidaJuncaceaeJuncusJuncus maritimus


A rhizomatous, clump-forming perennial herb of saltmarshes and saline dune-slacks. It also occurs in areas subject to freshwater seepage on low, exposed rocky cliff-tops and stony sea-loch shores. It is tolerant of a wide range of salinities and soil moisture, occurring at all levels in saltmarshes and in both silty and sandy substrates. Lowland.



World Distribution

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

Broad Habitats

Littoral sediment (includes saltmarsh and saltmarsh pools)

Light (Ellenberg): 8

Moisture (Ellenberg): 8

Reaction (Ellenberg): 8

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 5

January Mean Temperature (Celsius): 4.7

July Mean Temperature (Celsius): 15.1

Annual Precipitation (mm): 1081

Height (cm): 100

Perennation - primary


Life Form - primary

Non-bulbous geophyte (rhizome, corm or tuber)



Clonality - primary

Tussock-forming graminoid, may slowly spread

Count of 10km squares in Great Britain: 390

Count of 10km squares in Ireland: 196

Count of 10km squares in the Channel Isles: 11

Atlas Change Index: -0.26

Weighted Changed Factor: 5

Weighted Change Factor Confidence (90%)


JNCC Designations