A recent increase in observations of species of the lichen genus Ramalina in southern Holderness

摘要

I dedicate this note to the memory of Mr Albert Henderson, my friend and mentor in the study of stoneworts and lichens, 1992 - 2016. I feel privileged to have known Albert and to have benefited from his help to identify lichens of the genus Ramalina,the subject of the last correspondence between us. His very last words to me were, we are getting there", which I took as encouragement to carry on.