A winter-annual of neutral or moderately acidic soils, found on the coast in open, sandy or gravelly grassland rich in annuals and inland in drought-prone pastures, on paths and verges, and as a weed in lawns. It is tolerant of grazing, mowing and heavy trampling. Generally lowland, but reaching 365 m near Bowes (N.W. Yorks.).
T. micranthum is frequently confused with depauperate specimens of T. dubium, and the map may include such errors, but it is undoubtedly much better recorded than it was for the 1962 Atlas. Even allowing for this, however, it is likely that it has undergone a considerable increase in England and Wales since 1950.
Submediterranean-Subatlantic element; widely naturalised outside its native range.
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.