Lamiastrum galeobdolon subsp. argentatum
A stoloniferous herbaceous perennial growing on a variety of soils, and naturalised at the edge of woodland, on roadside verges and on tracksides, sometimes in unshaded places and often in places where garden rubbish is dumped. Lowland.
The history of this plant in our area is obscure. It was not recognised taxonomically until Smejkal described it as a new taxon in 1975 and Rutherford & Stirling (1987) brought it to the attention of British and Irish botanists. It was probably introduced in the late 1960s; the first record in the wild was in 1974. It is increasing rapidly, but seems to have been unevenly recorded and may be more common than the map suggests.
Origin uncertain; perhaps a cultivated variant of subsp. montanum.
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.