Draba incana

Tracheophyta MagnoliopsidaCruciferaeDrabaDraba incana


A morphologically variable biennial or perennial tufted herb, which is usually found on limestone rock ledges, screes and pavements, and occasionally in open grassland on thin droughted soils. It also occurs on sand dunes and, more rarely, on base-rich mica-schists and igneous rocks, and on sandstone cliffs. From sea level, but more commonly an upland plant, reaching 1080 m in the Breadalbanes (Mid Perth).



World Distribution

European Boreo-arctic Montane element; also in N. America.

© K.J. Walker, BSBI

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 5

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 2


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 2.3

July Mean Temperature (Celsius): 12.5

Annual Precipitation (mm): 1584

Life form information

Height (cm): 35

Perennation - primary

Biennial, including monocarpic perennials

Life Form - primary


Comment on Life Form

"CTW treat as a chamaephyte, but its basic behaviour is as a typical biennial semi-rosette plant."



Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 225

Count of 10km squares in Ireland: 29

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.75

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