Parmotrema perforatum (Jacq.) A. Massal. (photograph of a herbarium specimen showing a perforated apothecium) Growing on branch of deciduous tree in the recreation area opposite the entrance to Bald Cypress Nature Trail, Milburn Landing State Park, Worcester County, Maryland, USA; collected and identified by A. Norden and B. Norden (No. 83, 17 Jan 1973); specimen is now in the Lichen Herbarium of the New York Botanical Garden.
{{Information |Description='''''Parmotrema perforatum''''' (Jacq.) A. Massal. (photograph of a herbarium specimen showing a perforated apothecium) Growing on branch of deciduous tree in the recreation area opposite the entrance to Bald Cypress Nature Trai