Believes the 'Parmelia' from St Leonard's Forest and common on beech trees is a distinct species, most resembles 'P. lavigata' and 'P. scortea'; differences and similarities. Observations on 'Lecidea synothea', sent [James] Sowerby specimen , also sending 'Lichen olivacens', and flowers of the Sussex elm. Corrections for "English botany": error in translation of vexillum; [Robert] Brown first discoverer of 'Lichen mentosus' in Britain, having found it in Aberdeenshire in 1794.