Holcus mollis

Tracheophyta MagnoliopsidaPoaceaeHolcusHolcus mollis

Ecology

A creeping, rhizomatous perennial of well-drained acidic or neutral soils, found in Quercus and Betula woods, open conifer plantations, hedge banks, on heathland, and under Pteridium. It is capable of spreading into damper grassland and is locally a troublesome weed of arable land. H. mollis tolerates occasional mowing or light grazing but is a poor competitor with more vigorous grasses. 0-580 m (Greygarth Fell, W. Lancashire).

Status

Native

World Distribution

European Temperate element.

Broad Habitats

Light (Ellenberg): 6

Moisture (Ellenberg): 6

Reaction (Ellenberg): 3

Nitrogen (Ellenberg): 3

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.4

July Mean Temperature (Celsius): 14.5

Annual Precipitation (mm): 1101

Height (cm): 100

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Rhizome far-creeping

Count of 10km squares in Great Britain: 2537

Count of 10km squares in Ireland: 575

Count of 10km squares in the Channel Isles: 11

Atlas Change Index: 0.8

Weighted Changed Factor: 6

Weighted Change Factor Confidence (90%)

25

JNCC Designations

NBNSYS0000002620

Atlas text references

Atlas (394c)
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.
Ovington JD, Scurfield G
1956.  Biological Flora of the British Isles. No. 54. Holcus mollis L. Journal of Ecology. 44:272-280.