A group of tap-rooted perennial herbs growing in a wide range of habitats, but with a preference for infertile, rocky substrates. Habitats include rocky grassland, limestone pavement, cliffs, upland rock ledges, rocky river banks, roadsides, railway banks, walls and quarries. In grazed areas plants are often restricted to inaccessible sites. 0?1220 m (Cairngorms, S. Aberdeen).
Hieracium agg. currently includes 262 microspecies in our area, and reliable records of 221 were mapped by Perring & Sell (1968). The distribution of the aggregate is probably stable. The map of Hieracium pilosella sens. lat. in the 1962 Atlas comprises taxa now placed in Pilosella.
Circumpolar Wide-boreal 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.