Onopordum acanthium

Tracheophyta MagnoliopsidaAsteraceaeOnopordumOnopordum acanthium

Ecology

A tall biennial herb of fields, hedgerows, rubbish tips and other waste places, often near market gardens and farm buildings, and perhaps dispersed to new sites with manure or contaminated straw. 0-330 m (near Alston, Cumberland).

Status

Archaeophyte

World Distribution

As an archaeophyte O. acanthium has a Eurosiberian Temperate distribution; it is widely naturalised outside this range.

© G. Toone, IWNHAS

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 4

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 7

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.7

July Mean Temperature (Celsius): 15.9

Annual Precipitation (mm): 733

Height (cm): 200

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 778

Count of 10km squares in Ireland: 5

Count of 10km squares in the Channel Isles: 7

Atlas Change Index: 0.66

Weighted Changed Factor: 75

Weighted Change Factor Confidence (90%)

30

JNCC Designations

NBNSYS0000004499