Glaux maritima

Tracheophyta MagnoliopsidaPrimulaceaeGlauxGlaux maritima


A perennial herb typically forming dense colonies on moist saline soils. Habitats include saltmarshes, strandlines, damp shingle, wet sand, brackish dune-slacks, aerobic mud and spray-drenched rock crevices. It is a poor competitor which often forms pure stands, but also grows in open communities with other halophytes. Lowland, but persisting as an introduction at 570 m (Hartside, Cumberland).



World Distribution

Circumpolar Boreo-temperate element.

Broad Habitats

Littoral sediment (includes saltmarsh and saltmarsh pools)

Light (Ellenberg): 8

Moisture (Ellenberg): 7

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 5


Salt Tolerance (Ellenberg): 4

January Mean Temperature (Celsius): 4.2

July Mean Temperature (Celsius): 14.3

Annual Precipitation (mm): 1177

Life form information

Height (cm): 30

Perennation - primary


Life Form - primary

Non-bulbous geophyte (rhizome, corm or tuber)

Life Form - secondary


Comment on Life Form

a geophytic pseudoannual in Baltic area (Jerling 1988); is it ever hemicryptophyte?



Clonality - primary

Rhizome far-creeping

Comment on Clonality

"Yapp et al., J. Ecol. 5, p.77, 1917; Jerling, Vegetatio 74, 171-185"

Distribution information

Count of 10km squares in Great Britain: 935

Count of 10km squares in Ireland: 267

Count of 10km squares in the Channel Isles: 11

Atlas Change Index: -0.41

Weighted Changed Factor: -4

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 (205a)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jerling L
1988.  Population dynamics of Glaux maritima (L.) along a distributional cline. Vegetatio. 74:161-170.
Jerling L, Elmgren G
1996.  Phenotypic variation in clonal growth of Glaux maritima along an environmental cline. Acta Botanica Neerlandica. 45:367-380.
Meusel H, Jäger E, Rauschert S, Weinert E
1978.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.