Co. Clare, Ireland, 1986
Mountain avens is a small shrub, common in arctic and alpine regions. Relict populations can still be found in Western Ireland, and mountain areas of Britain.
Where pollen from this plant is found in ancient soil samples, it indicates a cold climate. It has given its name to an interruption to climatic warming at the end of the last glacial period. Glacial conditions returned for over a thousand years, in a period called the 'Younger Dryas'.