Gunpowder River, on rock outcrops. E.C. Uebel Herbarium – Baltimore County, Liberty Reservoir; Prince George's Co., on bark. Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) Myelochroa galbina (Ach.) Elix & Hale [Parmeliaceae] Syn.: Parmelia galbina Ach. Skorepa et al. (1977) – Allegany Co., on trunks of deciduous trees. Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Allegany Co., along Terrapin Run, on trunks of deciduous trees. E.C. Uebel Herbarium – Lichens of Soldiers Delight. Myelochroa metarevoluta (Asah.) Elix & Hale [Parmeliaceae] Syn.: Parmelia metarevoluta (Asahina) Hale Skorepa et al. (1977) – Montgomery Co., on oak trunk. Skorepa et al. (1979) – on bark. Myelochroa obsessa (Ach.) Elix & Hale [Parmeliaceae] Syn.: Parmelia obsessa Ach. Skorepa et al. (1977) – Baltimore Co., on acid rocks. Skorepa et al. (1979) – on bark, acidic rock. E.G. Worthley Herbarium - Baltimore Co., near Little Gunpowder River, on rock ledges. Nadvornikia sorediata R.C. Harris [Thelotremataceae] Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.), (6. Pocomoke) Nephroma helveticum Ach. subsp. helveticum [Nephromataceae] Skorepa et al. (1977) – Montgomery Co., Plummers Is. (collected by Fink). Skorepa et al. (1979) – on acidic rock. Normandina pulchella (Borrer) Nyl. [Verrucariaceae] Skorepa et al. (1979) – on bark. Ochrolechia androgyna (Hoffm.) Arnold [Pertusariaceae] Skorepa et al. (1977) – Anne Arundel Co. Skorepa et al. (1979) – on acidic rock. Ochrolechia cinera Chev. [Pertusariaceae] Biechele (2002) – lower eastern shore of Maryland. Ochrolechia pseudopallescens Brodo [Pertusariaceae] Lendemer & Knapp (2007) - (5. Hickory Pt.) Ochrolechia trochophora var. trochophora (Vainio) Oshio [Pertusariaceae] Syn.: Ochrolechia rosella (Müll. Arg.) Vers. Biechele (2002) – lower eastern shore of Maryland. Ochrolechia yasudae Vainio [Pertusariaceae] Skorepa et al. (1977) – Frederick Co. (collected by Plitt). Skorepa et al. (1979) – on acidic rock. Opegrapha varia Pers. [Roccellaceae] Lendemer & Knapp (2007) - (6. Pocomoke) Opegrapha viridis Pers. [Roccellaceae] Lendemer & Knapp (2007) - (5. Hickory Pt.) Opegrapha vulgata Ach. [Roccellaceae] Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake), (4. Sharptown) Pannaria conoplea (Ach.) Bory [Pannariaceae] Syn.: Pannaria pityrea auct. Skorepa et al. (1979) – on bark. Pannaria lurida (Mont.) Nyl. [Pannariaceae] Skorepa et al. (1979) – on bark. Biechele (2002) – lower eastern shore of Maryland. Parmelia saxatilis (L.) Ach. [Parmeliaceae] Skorepa et al. (1977) – Frederick Co., in mature oak woods. Skorepa et al. (1979) – on bark, acidic rock. E.G. Worthley Herbarium - Baltimore Co.,