Senecio aquaticus

Tracheophyta MagnoliopsidaAsteraceaeSenecioSenecio aquaticus

Ecology

A biennial, sometimes perennial, herb occurring in marshes, wet meadows, rush-pastures, and by streams, ponds and ditches. Generally lowland, but reaching 460 m in Weardale (Co. Durham) and in Co. Wicklow.

Status

Native

World Distribution

European Temperate element.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 8

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 14.5

Annual Precipitation (mm): 1109

Height (cm): 80

Perennation - primary

Biennial, including monocarpic perennials

Perennation - secondary

Perennial

Life Form - primary

Hemicryptophyte

Comment on Life Form

Most books say biennial; Stace (1997) says biennial to perennial.

Woodiness

Herbaceous

Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 2304

Count of 10km squares in Ireland: 919

Count of 10km squares in the Channel Isles: 1

Atlas Change Index: -0.92

Weighted Changed Factor: -22

Weighted Change Factor Confidence (90%)

17

JNCC Designations

NBNSYS0000004365