Poa trivialis

Tracheophyta MagnoliopsidaPoaceaePoaPoa trivialis


A stoloniferous perennial herb of open woodland, meadows, pastures, walls, waste ground, waysides and cultivated land; it also grows in marshes and beside ponds, ditches and streams. It was formerly included in commercial grass-seed mixtures, and is still used in amenity and wild-flower grasslands. It is a common wool alien. Generally lowland, but reaching 1065 m on Carn Eige, Glen Affric (Easterness).



World Distribution

Eurosiberian Wide-temperate element, but widely naturalised so that distribution is now Circumpolar Wide-temperate.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 6

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 6


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 14.5

Annual Precipitation (mm): 1095

Life form information

Height (cm): 70

Perennation - primary


Life Form - primary


Comment on Life Form

Based on a central rosette; best treated as hemicryptophyte



Clonality - primary

Tussock-forming graminoid, may slowly spread

Clonality - secondary

Shortly creeping and rooting at nodes

Comment on Clonality

Spreads vegetatively in lawns by 'stolons' (CPE); assumed here to be horizonal stems rooting at nodes

Distribution information

Count of 10km squares in Great Britain: 2721

Count of 10km squares in Ireland: 903

Count of 10km squares in the Channel Isles: 11

Atlas Change Index: 1.1

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 (381c)
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.