A key to common lichens on trees in England
This key to common species of lichens on trees was prepared in collaboration between two partners
of the European project KeyToNature (http://www.keytonature.eu) the Natural History Museum of
London and the University of Trieste, as a further aid to the Open Air Laboratory (OPAL) survey of
lichens as indicators of air quality.
Free:
Yes
Available as:
PDF
