What are lichens and why are they so important? Lichenologist Dr Rebecca Yahr breaks down the fascinating world of these small but mighty organisms. 📚 Learn how identify and understand 200 common species in the upcoming book Lichens of Britain and Ireland, by Rebecca and co-author Frances Stoakley. Out 11 December and available to pre-order NOW: https://rbge.cc/lichens-book The British Lichen Society, Bloomsbury Publishing UK | Royal Botanic Garden Edinburgh