along Gunpowder River, on bark of Quercus velutina. Parmelia squarrosa Hale [Parmeliaceae] Skorepa et al. (1977) – Garrett Co., on Acer. Skorepa et al. (1979) – on bark. Lendemer & Knapp (2007) - (6. Pocomoke) Parmelia sulcata Taylor [Parmeliaceae] Skorepa et al. (1977) – Washington Co., on deciduous trees. Skorepa et al. (1979) – on bark, acidic rock. E.G. Worthley Herbarium - Lichens of Soldiers Delight; Carroll Co., on bark of Fraxinus americana. E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. Parmelinopsis horrescens (Taylor) Elix & Hale [Parmeliaceae] Syn.: Parmelia horrescens Taylor Skorepa et al. (1977) – Calvert Co., on trunks of pines. Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Worcester Co., Milburn Landing, on bark of Pinus taeda. Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) Parmelinopsis minarum (Vainio) Elix & Hale [Parmeliaceae] Syn.: Parmelia dissecta Nyl. Skorepa et al. (1977) – Frederick Co., on oak trunk. Skorepa et al. (1979) – on bark, acidic rock. E.G. Worthley Herbarium - Lichens of Soldiers Delight. Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.) Parmeliopsis ambigua (Wulfen) Nyl. [Parmeliaceae] Skorepa et al. (1977) – Garrett Co., on trunk of deciduous tree. Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Worcester Co., Milburn Landing, on bark of Pinus taeda. Parmeliopsis hyperopta (Ach.) Arnold [Parmeliaceae] Syn.: Parmeliopsis diffusa (Weber) Riddle E.G. Worthley Herbarium - Baltimore Co., Owings Mills. Parmeliopsis subambigua Gyelnik [Parmeliaceae] Syn.: Parmeliopsis halei (Tuck.) Hale Skorepa et al. (1977) – Worcester Co., on pine trunks. Skorepa et al. (1979) – on bark. Lendemer & Knapp (2007) - (4. Sharptown), (6. Pocomoke) Parmotrema cetratum (Ach.) Hale [Parmeliaceae] Syns.: Parmelia cetrata Ach, Rimelia cetrata (Ach.) Hale & Fletcher Skorepa et al. (1977) – Worcester Co., on trunk of Sweet gum. Skorepa et al. (1979) – on bark. Parmotrema chinense (Osbeck) Hale & Ahti [Parmeliaceae] Syn.: Parmotrema perlatum (Huds.) Choisy E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple, on oak limb. Parmotrema crinitum (Ach.) M. Choisy [Parmeliaceae] Syn.: Parmelia crinita Ach. Skorepa et al. (1977) – Worcester Co., on trunk of pine. Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Baltimore Co., Owings Mills, on trees. Parmotrema dilatatum (Vainio) Hale [Parmeliaceae] Syn.: Parmelia dilatata Vainio Skorepa et al. (1977) – Dorchester Co., on trunks of deciduous trees. Skorepa et al. (1979) – on