Allium sphaerocephalon

Tracheophyta MagnoliopsidaLiliaceaeAlliumAllium sphaerocephalon

Ecology

A bulbous perennial herb found as a possible native at only two localities: on dry, rocky S.- and W.-facing slopes in the Avon Gorge (W. Gloucs.), and on rough, sandy ground by the sea at St. Aubin`s Bay, Jersey. Both populations are very small. Lowland.

Status

Native

World Distribution

European Southern-temperate element.

Broad Habitats

Light (Ellenberg): 9

Moisture (Ellenberg): 3

Reaction (Ellenberg): 8

Nitrogen (Ellenberg): 2

0

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 5.6

July Mean Temperature (Celsius): 16.8

Annual Precipitation (mm): 850

Life form information

Height (cm): 80

Perennation - primary

Perennial

Life Form - primary

Bulbous geophyte

Woodiness

Herbaceous

Clonality - primary

Tuberous or bulbous, slowing cloning by offsets

Count of 10km squares in Great Britain: 1

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 2

Distribution information

Plantatt Conservation Status

Endangered

JNCC Designations

NBNSYS0000002195

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

Atlas (325c)
Mathew B
1996.  A review of Allium Section Allium.
Wigginton MJ
1999.  British Red Data Books. 1. Vascular plants, edn 3.