A climbing or scrambling annual of freely-draining acidic, mineral or peaty soils. It occurs in deciduous and coniferous woodland, especially in clearings and in recently felled areas, under Pteridium and in scrub, and occasionally over rock outcrops. In Ireland, it occurs on shaded boulder slopes. Generally lowland, but reaching 430 m on Deadwater Fell (S. Northumb.).
The overall distribution of this species has not changed since the 1962 Atlas, although it is now much better recorded.
Oceanic Temperate element.
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
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1991) .
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.