Vicia sativa subsp. nigra
A procumbent or ascending annual, found as a native in many grassy and waste places, particularly on dry and sandy sites such as dunes, shingle, sea-cliffs and heathland. Inland, it is often found as an introduction in grassy sites, but these are rarely recorded as alien. Generally lowland, reaching 330 m at Dent Head (N.W. Yorks.).
Some inland records of this subspecies are probably errors for subsp. segetalis as these two subspecies were not separated in national Floras until Stace (1991). Other inland records probably represent introduced rather than native plants.
Wider distribution uncertain.
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.