[Acarosporaceae] Skorepa et al. (1979) – on acidic rock. Sarcogyne regularis Körber [Acarosporaceae] Skorepa et al. (1979) – on calcareous rock. E.C. Uebel Herbarium – Prince George's Co., Greenbelt, on hill of concrete. Sarcosagium campestre (Fr.) Poetsch & Schiedem. [Acarosporaceae] Syn.: Biatorella campestris (Fr.) Almq. Skorepa et al. (1979) – on soil. Schismatomma glaucescens (Nyl. ex Willey) R.C. Harris [Roccellaceae] Lendemer & Knapp (2007) - (4. Sharptown) Scoliciosporum chlorococcum (Stenh.) Vezda [Lecanoraceae] Syn.: Bacidia chlorococca (Graeve ex Stizenb.) Lett. Skorepa et al. (1977) – Montgomery Co., on oak. Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Worcester Co., Milburn Landing. E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of Acer rubrum. Lendemer & Knapp (2007) - (2. Idylwild) Scoliciosporum umbrinum (Ach.) Arnold [Lecanoraceae] Syn.: Bacidia umbrina (Ach.) Bausch Skorepa et al. (1977) – Garrett Co., on aspens. Skorepa et al. (1979) – on acid rock. Sphinctrina turbinata (Pers ex Fr.) de Not. [Sphinctrinaceae] E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on Aspicilia caesiocinerea. Sticta fuliginosa (Hoffm.) Ach. [Lobariaceae] E.G. Worthley Herbarium - Frederick Co., along Appalachian Trail, on soil. Teloschistes chrysophthalmus (L.) Th. Fr. [Teloschistaceae] Skorepa et al. (1979) – on bark. Tephromela atra (Huds.) Hafellner [Bacidiaceae] Lendemer & Knapp (2007) - (6. Pocomoke) Thelidium minutulum Körber [Verrucariaceae] Lendemer & Knapp (2007) - (5. Hickory Pt.) Thelotrema monospermum R.C. Harris [Thelotremataceae] Lendemer & Knapp (2007) - (6. Pocomoke) Thelotrema subtile Tuck. [Thelotremataceae] Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) Trapelia coarctata (Sm.) M. Choisy [Agyriaceae] Syn.: Lecidea coarctata (Sm.) Nyl. Skorepa et al. (1979) – on acidic rock. Trapeliopsis flexuosa (Fr.) Coppins & P. James [Agyriaceae] Syn.: Lecidea aeruginosa Borrer Skorepa et al. (1977) – Harford Co., on fence post. Skorepa et al. (1979) – on wood. E.C. Uebel Herbarium – Prince George's Co., NE Branch of Anacostia River Bike Trail, on weathered fence rail. Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake) Trapeliopsis granulosa (Hoffm.) Lumbsch [Agyriaceae] Syn.: Lecidea granulosa (Hoffm.) Ach. Skorepa et al. (1979) – on soil. E.G. Worthley Herbarium - Montgomery Co., Great Falls, on timber. Trypethelium virens Tuck. ex Michener [Trypetheliaceae] Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Calvert Co., on bark. Lendemer & Knapp (2007) - (4. Sharptown), (5. Hickory Pt.) Tuckermanella fendleri (Nyl.) Essl. [Parmeliaceae] Syn.: Cetraria fendleri (Nyl.) Tuck.; Tuckermannopsis fendleri (Nyl.) Hale Skorepa et al. (1977) –