Helictotrichon pratense

Tracheophyta MagnoliopsidaPoaceaeHelictotrichonHelictotrichon pratense

Ecology

A perennial herb of calcareous rendzina and brown earth soils, usually over chalk or limestone, but also over glacial deposits and basic igneous rocks. It is characteristic of well-grazed chalk and limestone downland, but is also found on screes, cliffs and limestone pavements, and occasionally in open Fraxinus woods, on sand dunes and on montane ledge communities with Dryas octopetala. 0-835 m (Breadalbanes, Mid Perth).

Status

Native

World Distribution

European Temperate element.

Broad Habitats

Calcareous grassland (includes lowland and montane types)

Light (Ellenberg): 7

Moisture (Ellenberg): 4

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 2

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 2.9

July Mean Temperature (Celsius): 14.6

Annual Precipitation (mm): 986

Height (cm): 80

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Comment on Life Form

basically a hemicryptophyte with some wintergreen bits

Woodiness

Herbaceous

Clonality - primary

Tussock-forming graminoid, may slowly spread

Count of 10km squares in Great Britain: 1001

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 1

Atlas Change Index: 0.31

Weighted Changed Factor: -28

Weighted Change Factor Confidence (90%)

27

JNCC Designations

NBNSYS0000002616