A perennial herb of calcareous grassland, scrub, open woodland, cliffs and sand dunes. It is most frequent on chalk and oolite, and curiously absent from apparently suitable habitat on other limestones and base-rich substrates. It also occurs as a garden escape on roadsides and waste ground. 0-355 m (Oddendale, Westmorland).
This species has seen a gradual decline outside its core areas, due to habitat loss and a decline in grazing. Many populations are small, often consisting of only a few plants (Green et al., 1997). C. glomerata is widely grown in gardens and several cultivars are available.
Eurasian Temperate element, with a continental distribution in W. Europe.
Light (Ellenberg): 8
Moisture (Ellenberg): 4
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 3
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.4
July Mean Temperature (Celsius): 15.8
Annual Precipitation (mm): 737
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.