An annual or biennial shade-tolerant herb found on a wide range of soil types, except those that are strongly acidic. Its habitats include woods, hedgerows, walls, shaded banks, limestone pavements, screes and coastal shingle; also in disturbed artificial habitats. 0-700 m (Great Dun Fell, Westmorland).
There is no evidence of any appreciable change since the 1962 Atlas. G. robertianum is very variable; subsp. maritimum and subsp. celticum are mapped by Perring & Sell (1968).
European Temperate element; also in C. and E. Asia and widely naturalised outside its native range.
Height (cm): 50
Perennation - primary
Perennation - secondary
Life Form - primary
Life Form - secondary
Comment on Life Form
Clonality - primary
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 Supp (16a
1955. Geranium purpureum Vill. and G. robertianum L. in the British Flora: I. Geranium purpureum. Watsonia. 3:160-167.
1988. Comparative Plant Ecology.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1978. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.
1997. New Flora of the British Isles, edn 2.