Allium triquetrum

Tracheophyta MagnoliopsidaLiliaceaeAlliumAllium triquetrum


A bulbous perennial herb, spreading by ant-dispersed seed on roadsides, in hedge banks, on field margins and in rough and waste ground. Lowland.



World Distribution

Native of the W. & C. Mediterranean region.

© P. Shannon

Broad Habitats

Boundary and linear features (eg hedges, roadsides, walls)

Light (Ellenberg): 6

Moisture (Ellenberg): 4

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 5


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 4.9

July Mean Temperature (Celsius): 15.7

Annual Precipitation (mm): 956

Life form information

Height (cm): 45

Perennation - primary


Life Form - primary

Bulbous geophyte



Clonality - primary

Tuberous or bulbous, slowing cloning by offsets

Distribution information

Count of 10km squares in Great Britain: 311

Count of 10km squares in Ireland: 123

Count of 10km squares in the Channel Isles: 13

Atlas Change Index: 2.46

Weighted Changed Factor: 72

Weighted Change Factor Confidence (90%)


Distribution information

JNCC Designations


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 (326d)