Lichens of Soldiers Delight. Skorepa et al. (1979) – on bark. Biechele (2002) – lower eastern shore of Maryland. E.G. Worthley Herbarium - Wicomico Co., Wicomico State Park; on Loblolly Pine; Worcester Co., Milburn Landing, on bark of Loblolly Pines. Tuckermannopsis americana (Sprengel) Hale [Parmeliaceae] Lendemer & Knapp (2007) - (4. Sharptown) Tuckermannopsis ciliaris (Ach.) Gyelnik [Parmeliaceae] Syn.: Cetraria ciliaris Ach. Skorepa et al. (1977) – Lichens of Soldiers Delight. Skorepa et al. (1979) – on bark. E.G. Worthley Herbarium - Lichens of Soldiers Delight; Wicomico Co., on bark. Umbilicaria mammulata (Ach.) Tuck. [Umbilicariaceae] Syn.: Gyrophora dillenii (Tuck.) Müll. Skorepa et al. (1977) – Garrett Co., on conglomerate. Skorepa et al. (1979) – on bark, acidic rock. E.G. Worthley Herbarium - Baltimore Co., Loch Raven, on rock outcrop; Frederick Co., South Mt., on boulders; Montgomery Co., Sugarloaf Mt., on boulders. Umbilicaria muehlenbergii (Ach.) Tuck. [Umbilicariaceae] Skorepa et al. (1977) – Allegany Co., on rock outcrop. Skorepa et al. (1979) – on acidic rock. Umbilicaria vellea (L.) Hoffm. [Umbilicariaceae] Skorepa et al. (1977) – No locality. (collected by Plitt 1912) Skorepa et al. (1979) – on acidic rock. Usnea filipendula Stirton [Parmeliaceae] Syn.: Usnea dasypoga (Ach.) Rohl. Skorepa et al. (1977) – Garrett Co., (collected by Smith). Skorepa et al. (1979) – on bark. Usnea mutabilis Stirton [Parmeliaceae] Skorepa et al. (1977) – Worcester Co., on pines. Skorepa et al. (1979) – on bark. Biechele (2002) – lower eastern shore of Maryland. E.G. Worthley Herbarium - Worcester Co., Pocomoke State Park, on Taxodium distichum. Usnea pensylvanica Motyka [Parmeliaceae] Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) Usnea strigosa (Ach.) Eaton [Parmeliaceae] Skorepa et al. (1977) – Worcester Co., on deciduous trees. Biechele (2002) – lower eastern shore of Maryland. E.G. Worthley Herbarium – Worcester Co.; Calvert Co, Battle Creek Cypress Swamp; St. Mary's Co.; Wicomico Co. E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. Lendemer & Knapp (2007) - (6. Pocomoke) Usnea strigosa subsp. rubiginea (Michaux) I. Tav. [Parmeliaceae] Syn.: Usnea rubiginea (Michx.) Massal. Skorepa et al. (1977) – Worcester Co., on deciduous trees. Skorepa et al. (1979) – on bark. Usnea subscabrosa Nyl. ex Motyka [Parmeliaceae] Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) Usnea trichodea Ach. [Parmeliaceae] Skorepa et al. (1977) – Worcester Co., on tops of Cypress trees. Skorepa et al. (1979) – on bark. Biechele