Senecio squalidus

Tracheophyta MagnoliopsidaAsteraceaeSenecioSenecio squalidus

Ecology

A short-lived perennial herb of waste places, walls, railways, cinders, roadsides and gardens, where it is often thoroughly established on well-drained soils. Lowland.

Status

Neophyte

World Distribution

S. squalidus appears to have arisen in cultivation in the Oxford Botanic Garden (Abbott et al., 2000).

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 4

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 7

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.7

July Mean Temperature (Celsius): 15.5

Annual Precipitation (mm): 850

Height (cm): 50

Perennation - primary

Annual

Perennation - secondary

Perennial

Life Form - primary

Therophyte (annual land plant)

Life Form - secondary

Chamaephyte

Comment on Life Form

Not really a biennial; occasionally perennates but can complete life cycle in year

Woodiness

Herbaceous

Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 1494

Count of 10km squares in Ireland: 75

Count of 10km squares in the Channel Isles: 4

Atlas Change Index: 0.77

Weighted Changed Factor: -37

Weighted Change Factor Confidence (90%)

18

JNCC Designations

NBNSYS0000004367