Poa compressa

Tracheophyta MagnoliopsidaPoaceaePoaPoa compressa

Ecology

A rhizomatous perennial herb of rough or stony ground, cinders, dry grassy banks, waysides and walls. Some populations on rubbish tips and waste ground are probably introductions from wool shoddy and other sources. Generally lowland, but reaching 365 m at Mallerstang (Westmorland).

Status

Native

World Distribution

European Temperate element; widely naturalised outside its native range.

Broad Habitats

Boundary and linear features (eg hedges, roadsides, walls)

Light (Ellenberg): 9

Moisture (Ellenberg): 4

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 4

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 15.6

Annual Precipitation (mm): 850

Height (cm): 50

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Rhizome far-creeping

Count of 10km squares in Great Britain: 1063

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 2

Atlas Change Index: 0.21

Weighted Changed Factor: 17

Weighted Change Factor Confidence (90%)

35

JNCC Designations

NBNSYS0000002553