Biological flora of the British Isles: Campanula rotundifolia

Stevens, Carly and McAllister, H. and Wilson, J. (2012) Biological flora of the British Isles: Campanula rotundifolia. Journal of Ecology, 100 (3). pp. 821-839. ISSN 0022-0477

Abstract

Campanula rotundifolia (Harebell) is widespread and cytologically diverse in the British Isles. Hexaploids have an oceanic, westerly/northerly distribution, tetraploids are more easterly/southern, and occasional pentaploids occur. It tolerates diverse climatic and soil conditions, becoming rare on fertile lowland clays, where there are more vigorous competitors. It is threatened by agricultural intensification, reversion of grassland to scrub, disturbance, and atmospheric pollution.