Briza media

Tracheophyta MagnoliopsidaPoaceaeBrizaBriza media


A shortly rhizomatous perennial grass, most frequently found in unimproved, species-rich, well-grazed grassland on infertile, calcareous soils and favouring well-drained slopes. However, it also occurs in old meadows and pastures on neutral and sometimes acidic soils, in the drier parts of fens, and occasionally in soligenous mires. 0-720 m (Knock Fell, Westmorland).



World Distribution

European Temperate element.

© M. Cotterill, IWNHAS

Broad Habitats

Calcareous grassland (includes lowland and montane types)

Light (Ellenberg): 8

Moisture (Ellenberg): 5

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 3


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.5

July Mean Temperature (Celsius): 14.9

Annual Precipitation (mm): 971

Life form information

Height (cm): 62

Perennation - primary


Life Form - primary




Clonality - primary

Rhizome shortly creeping

Distribution information

Count of 10km squares in Great Britain: 1853

Count of 10km squares in Ireland: 588

Count of 10km squares in the Channel Isles: 2

Atlas Change Index: -0.75

Weighted Changed Factor: -25

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 (383b)
Grime JP, Hodgson JG, Hunt R
1988.  Comparative Plant Ecology.
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.