Lactuca virosa

Tracheophyta MagnoliopsidaAsteraceaeLactucaLactuca virosa

Ecology

An annual or biennial herb, sensitive to grazing, occurring as a native on coastal cliffs, inland rock outcrops and perhaps sand dunes, but much more widespread as a plant of rank calcareous grassland, woodland margins, road-banks, quarries, tracks and rough ground. Lowland.

Status

Native

World Distribution

Suboceanic Southern-temperate element.

© G. Toone, IWNHAS

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 4

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 7

0

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 16

Annual Precipitation (mm): 693

Life form information

Height (cm): 200

Perennation - primary

Biennial, including monocarpic perennials

Perennation - secondary

Annual

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Little or no vegetative spread

Distribution information

Count of 10km squares in Great Britain: 650

Count of 10km squares in Ireland: 3

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 1.16

Weighted Changed Factor: 66

Weighted Change Factor Confidence (90%)

23

Distribution information

JNCC Designations

NBNSYS0000004535

PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.

Atlas text references