An annual growing in all kinds of fertile, disturbed ground, on roadsides, pavements, walls, railway banks and rough grassland. Generally lowland, but reaching 450 m on the Kirkstone Pass (Westmorland).
The distribution of this species is stable in Britain, but shows some increase in Ireland. Three subspecies occur in our area: subsp. murinum is common throughout the range, while subsp. glaucum and subsp. leporinum are infrequent casuals from wool shoddy and esparto.
As an archaeophyte H. murinum has a Eurosiberian Southern-temperate distribution, but it is widely naturalised so that its distribution is now Circumpolar Southern-temperate.
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.