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The following list of Lichens of Maryland is derived from the following sources: *(1) lichens listed in the 1977 publication by Skorepa (Allen C. Skorepa), Norden (), and Windler. *(2) lichens listed in the 1979 publication by Skorepa, Norden, and Windler. *(3) lichens listed in the 2002 publication by Biechele as occurring on Maryland's Delmarva Peninsula. *(4) lichens in Elmer Worthley's personal herbarium. *(5) lichens found in Maryland by Edward Uebel. *(6) lichens reported on Maryland's Delmarva Peninsula by Lendemer and Knapp (2007) at six locations: 1. Millington State Wildlife Management Area (1. Millington); 2. Idylwild State Wildlife Management Area (2. Idylwild); 3. Chesapeake State Forest (3. Chesapeake); 4. Sharptown Dunes (4. Sharptown); 5. Hickory Point Cypress Swamp (5. Hickory Pt.); 6. Pocomoke State Forest (6. Pocomoke). #Acarospora fuscata (Schrader) Arnold () ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Carroll Co., on stone wall. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Acarospora schleicheri (Ach.) A. Massal. () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Skorepa ''et al.'' (1979) – on acidic rock. #Ahtiana aurescens (Tuck.) Thell & Randlane () ##Syn.: ''Cetraria aurescens'' Tuck. ##Skorepa ''et al.'' (1977) – Allegany Co., on branches of pines. ##Skorepa ''et al.'' (1979) – on bark. #Allocetraria oakesiana (Tuck.) Randlane & Thell () ##Syn.: ''Cetraria oakesiana'' Tuck. ##Skorepa ''et al.'' (1977) – Frederick Co., base of oak. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Garrett Co., along Big Run, on stumps. #Amandinea milliaria (Tuck.) P. May & Sheard () ##Syn.: ''Rinodina milliaria'' Tuck. ##Skorepa ''et al.'' (1977) – Calvert Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. #Amandinea polyspora (Willey) E. Lay & P. May () ##Syn.: ''Buellia polyspora'' (Willey) Vainio ##Skorepa ''et al.'' (1977) – Carroll Co., bark of deciduous tree. ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. #Amandinea punctata (Hoffm.) Coppins & Scheid. () ##Syn.: ''Buellia punctata'' (Hoffm.) Massal. ##Skorepa ''et al.'' (1977) – Worcester Co., on oak twigs. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild) #Anaptychia palmulata (Michaux) Vainio () ##Skorepa ''et al.'' (1977) – Calvert Co., trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Baltimore Co.; Calvert Co.; Frederick Co. #Anisomeridium polypori (Ellis & Everh.) M.E. Barr () ##Lendemer & Knapp (2007) - (4. Sharptown) #Anzia americana Yoshim. & Sharp () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Anzia colpodes (Ach.) Stizenb. () ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (6. Pocomoke) #Arctoparmelia centrifuga? (L.) Hale () ##E.G. Worthley Herbarium - Baltimore Co., Owings Mills. #Arthonia caesia (Flotow) Körber () ##Skorepa ''et al.'' (1977) – Baltimore Co., trunk of oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark; Ridge Road, on bark. ##Lendemer & Knapp (2007) (1. Millington) #Arthonia rubella (Fée) Nyl. () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Arthopyrenia cinereopruinosa (Schaerer) A. Massal. () ##Syn.: ''Arthopyrenia pinicola'' (Hepp) Mass. ##Skorepa ''et al.'' (1977) – Montgomery Co., trunk of elm. ##Skorepa ''et al.'' (1979) – on bark. #Arthothelium interveniens (Nyl.) Zahlbr. () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Aspicilia caesiocinerea (Nyl. ex Malbr.) Arnold () ##Syn.: ''Lecanora caesiocinerea'' Nyl. ##Skorepa ''et al.'' (1977) – Allegany Co., on shale outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Montgomery Co., Great Falls. ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on acidic rock. #Aspicilia cinerea (L.) Körber () ##Syn.: ''Lecanora cinerea'' (L.) Somm. ##Skorepa ''et al.'' (1977) – Baltimore Co., on rock ledges. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. #Bacidia laurocerasi (Delise ''ex'' Duby) Zahlbr. subsp. laurocerasi () ##Syn.: ''Bacidia atrogrisea'' (Delilse ''ex'' Hepp) Körber ##Skorepa ''et al.'' (1979) – on bark. #Bacidia polychroa (Th. Fr.) Körber () ##Syn.: ''Bacidia fuscorubella'' (Hoffm.) Bausch. ##Skorepa ''et al.'' (1977) – Baltimore Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. #Bacidia schweinitzii (Fr. ''ex'' E. Michener) A. Schneider () ##Skorepa ''et al.''. (1977) – Montgomery Co., on oak. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight; Anne Arundel Co., Baltimore Co., Wicomico Co. ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) #Bacidia trachona (Ach.) Lettau () ##Skorepa ''et al.'' (1979) – on calcareous rock. #Bacidina egenula (Nyl.) Vězda () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Bacidina inundata (Fr.) Vezda () ##Skorepa ''et al.'' (1979) – on bark. #Baculifera curtisii (Tuck.) Marbach () ##Syn.: ''Buellia curtisii'' (Tuck.) Imsh. ##Skorepa ''et al.''. (1977) – Calvert Co., trunk of deciduous tree. ##Skorepa ''et al.'' (1979) – on bark. #Bathelium carolinianum (Tuck.) R.C. Harris () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Biatora vernalis (L.) Fr. () ##Syn.: ''Lecidea vernalis'' (L.) Ach. ##Skorepa ''et al.'' (1977) – Frederick Co., on trunks of oaks. ##Skorepa ''et al.'' (1979) – on bark. #Brigantiaea leucoxantha (Spreng.) R. Sant. & Haffel. () ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Bryoria furcellata (Fr.) Brodo & D. Hawksw. () ##Syn.: ''Alectoria nidulifera'' Norrl. ##Skorepa ''et al.'' (1977) – Garrett Co., on pine trunks. ##Skorepa ''et al.'' (1979) – on bark, acid rock. ##E.G. Worthley Herbarium - Wicomico Co. #Buellia badia (Fr.) Massal. () ##Syn.: ''Buellia turgescens'' Tuck. ##E.G. Worthley Herbarium - Baltimore Co., St. Thomas Cemetery. #Buellia curtisii (Tuck.) Imshaug () ##Lendemer & Knapp (2007) (1. Millington), (3. Chesapeake) #Buellia spuria (Schaerer) Anzi () ##Skorepa ''et al.'' (1977) – Montgomery Co. (collection by Fink) ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight. #Buellia stigmaea Tuck. () ##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Plitt) ##Skorepa ''et al.'' (1979) – on acidic rock. #Buellia stillingiana J. Steiner () ##Skorepa ''et al.'' (1977) – Calvert Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Worcester Co. ##Lendemer & Knapp (2007) - (4. Sharptown) #Buellia vernicoma Tuck. () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Byssoloma leucoblepharum Vainio () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Byssoloma meadii (Tuck.) S. Ekman () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Calicium salicinum Pers. () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Caloplaca camptidia (Tuck.) Zahlbr. () ##Skorepa ''et al.'' (1977) – Montgomery Co., oak woods. ##Skorepa ''et al.'' (1979) – on bark. #Caloplaca cerina (Ehrh. ''ex'' Hedwig) Th. Fr. () ##Skorepa ''et al.'' (1977) – Garrett Co., on aspen trunks. ##Skorepa ''et al.'' (1979) – on bark. #Caloplaca citrina (Hoffm.) Th. Fr. () ##Skorepa ''et al.'' (1977) – Baltimore Co., on concrete bridge. ##Skorepa ''et al.'' (1979) – on cement. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight; Baltimore Co., on wall of stone and cement. #Caloplaca feracissima H. Magn. () ##Skorepa ''et al.'' (1977) – Frederick Co., on concrete. ##Skorepa ''et al.'' (1979) – on cement. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight. ##E.C. Uebel Herbarium – Prince George's Co., on hill of concrete. #Caloplaca flavorubescens (Hudson) J. R. Laundon () ##Syn.: ''Caloplaca aurantiaca'' (Lightf.) Th. Fr. ##Skorepa ''et al.'' (1977) – Allegany Co., on cement. ##Skorepa ''et al.'' (1979) – on cement. ##E.G. Worthley Herbarium - Baltimore Co., Owings Mills. #Caloplaca flavovirescens (Wulfen) Dalla Torre & Sarnth. ##Skorepa ''et al.'' (1977) – Washington Co., on limestone. ##Skorepa ''et al.'' (1979) – on calcareous rock, cement. #Caloplaca holocarpa (Hoffm. ''ex'' Ach.) M. Wade () ##Skorepa ''et al.'' (1977) – Frederick Co., on timbers. ##Skorepa ''et al.'' (1979) – on bark, calcareous rock, wood. #Caloplaca lobulata (Flörke) de Lesd. () ##Skorepa ''et al.'' (1977) – Cecil Co., on serpentine rock. ##Skorepa ''et al.'' (1979) – acidic rock. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight; Baltimore Co., on bricks. #Caloplaca microphyllina (Tuck.) Hasse () ##Skorepa ''et al.'' (1979) – wood. #Caloplaca oxfordensis Fink () ##Skorepa ''et al.'' (1977) – Washington Co., on limestone. ##Skorepa ''et al.'' (1979) – on acidic rock. #Caloplaca sideritis (Tuck.) Zahlbr. () ##Skorepa ''et al.'' (1977) – Frederick Co., on cement foundation. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight. #Caloplaca subsoluta (Nyl.) Zahlbr. () ##Syn.: ''Caloplaca modesta'' (Zahlbr.) Fink ##Skorepa ''et al.'' (1977) – Montgomery Co. (collected by Fink) ##Skorepa ''et al.'' (1979) – on acidic rock. #Candelaria concolor (Dickson) B. Stein () ##Skorepa ''et al.'' (1977) – Allegany Co., on tree trunk. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight; Frederick Co.; Carroll Co. ##E.C. Uebel Herbarium – Baltimore Co.; Prince George's Co., on bark. ##Lendemer & Knapp (2007) - (2. Idylwild) #Candelariella reflexa (Nyl.) Lettau () ##Lendemer & Knapp (2007) - (3. Chesapeake) #Candelariella vitellina (Hoffm.) Müll. Arg. () ##Skorepa ''et al.'' (1977) – Baltimore Co., on rock face. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight. #Canoparmelia caroliniana (Nyl.) Elix & Hale () ##Syn.: ''Parmelia caroliniana'' Nyl. ##Skorepa ''et al.'' (1977) – Worcester Co., on tree trunks. ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) #Canoparmelia crozalsiana (de Lesd. ''ex'' Harm.) Elix & Hale () ##Syn.: ''Parmelia crozalsiana'' B. de Lesd. ''ex'' Harm. ##Skorepa ''et al.'' (1977) – Frederick Co., on trunk of oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Talbot Co., on Sycamore. ##Lendemer & Knapp (2007) - (2. Idylwild) #Canoparmelia texana (Tuck.) Elix & Hale () ##Syn.: ''Parmelia texana'' Tuck. ##Skorepa ''et al.'' (1977) – Frederick Co., on trunk of maple. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild) #Catapyrenium cinereum (Pers.) Körber () ##Syn.: ''Dermatocarpon hepaticum'' (Ach.) Th. Fr. ##Skorepa ''et al.'' (1979) – on soil. ##E.G. Worthley Herbarium – Lichens of Soldiers Delight. #Catillaria chalybeia (Borrer) A. Massal. () ##Skorepa ''et al.'' (1977) – Frederick Co., on rocks. ##Skorepa ''et al.'' (1979) – on acidic rock. #Cetraria arenaria Kärnefelt () ##Syn.: ''Cetraria islandica'' (L.) Ach. ##Skorepa ''et al.'' (1977) – Garrett Co., on soil. ##Skorepa ''et al.'' (1979) – on soil. ##E.G. Worthley Herbarium - Garrett Co., Carey Run. #Cetrelia cetrarioides (Duby) Culb. & C. Culb. () ##E.G. Worthley Herbarium - Baltimore Co., Owings Mills, on oak. #Cetrelia chicitae (W. Culb.) W. Culb. & C. Culb. () ##Skorepa ''et al.'' (1977) – Garrett Co., on conglomerate. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Frederick Co., Mt. Catoctin Park. #Cetrelia olivetorum (Nyl.) Culb. & C. Culb. () ##Skorepa ''et al.'' (1977) – Allegany Co., on trunk of deciduous tree. ##Skorepa ''et al.'' (1979) – on bark. #Chrismofulvea dialyta (Nyl.) Marbach () ##Syn.: ''Buellia dialyta'' (Nyl.) Tuck. ##Skorepa ''et al.'' (1979) – on bark. #Chrysothrix candelaris (L.) J. R. Laundon () ##Syn.: ''Lepraria candelaris'' (L.) Fr. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Montgomery Co., on rock outcrop. ##E.C. Uebel Herbarium – Baltimore Co., Hollofield, on rock cliff. ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Chrysothrix flavovirens Tønsberg s. ''lat.'' () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Cladonia apodocarpa Robbins () ##Skorepa ''et al.'' (1977) – Frederick Co., on soil. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Gunpowder Falls; Allegany Co. #Cladonia arbuscula (Wallr.) Flotow () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Allegany Co., Green Ridge State Forest; Wicomico Co. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Cladonia atlantica A. Evans () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. #Cladonia beaumontii (Taylor) Vainio () ##Biechele (2002) – lower eastern shore of Maryland. #Cladonia boryi Tuck. () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##This is probably a misidentification of ''Cladonia caroliniana''. #Cladonia caespiticia (Pers.) Flörke () ##Skorepa ''et al.'' (1977) – Worcester Co., on sandy soil. ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Carroll Co., Liberty Reservoir. #Cladonia cariosa (Ach.) Sprengel () ##E.G. Worthley Herbarium - Lichens of Soldiers Delight. #Cladonia caroliniana Tuck. () ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Cladonia cervicornis subsp. verticillata (Hoffm.) Ahti () ##Syn.: ''Cladonia verticillata'' (Hoffm.) Schaer. ##Skorepa ''et al.'' (1977) – Queen Anne's Co., on soil. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Worcester Co.; Queen Anne's Co.; Baltimore Co. #Cladonia chlorophaea (Flörke ''ex'' Sommerf.) Sprengel () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Prince George's Co.; Anne Arundel Co.; Washington Co. #Cladonia coniocraea (Flörke) Sprengel () ##Skorepa ''et al.'' (1977) – Garrett Co., on base of pine. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Baltimore Co.; Calvert Co. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., Liberty Reservoir. #Cladonia cristatella Tuck. () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Prince George's Co.; Garrett Co., Swallow Falls. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co., Greenbelt. #Cladonia didyma (Fée) Vainio var. didyma () ##Lendemer & Knapp (2007) - (2. Idylwild) #Cladonia fimbriata (L.) Fr. () ##Skorepa ''et al.'' (1977) – Garrett Co., on sandstone boulder. ##E.G. Worthley Herbarium - Garrett Co.; Allegany Co., Green Ridge State Forest. #Cladonia floerkeana (Fr.) Flörke () ##Skorepa ''et al.'' (1977) – Harford Co., on rotting wood. #Cladonia furcata (Hudson) Schrader () ##Skorepa ''et al.'' (1977) – Harford Co., on moss. #Cladonia gracilis (L.) Willd. subsp. ''gracilis'' () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight. #Cladonia grayi Merr. ''ex'' Sandst. () ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. ##Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake) #Cladonia incrassata Flörke () ##Skorepa ''et al.'' (1977) – Wicomico Co., on sandy soil. ##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) #Cladonia macilenta Hoffm. () ##Skorepa ''et al.'' (1977) – Harford Co., on rotting wood. ##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir; Prince Georges Co., College Park. ##Lendemer & Knapp (2007) - (2. Idylwild) #Cladonia macilenta var. bacillaris (Genth) Schaerer () ##Syn.: ''Cladonia bacillaris'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Prince George's Co. ##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir. ##Lendemer & Knapp (2007) - (3. Chesapeake) #Cladonia mateocyatha Robbins () ##Skorepa ''et al.'' (1977) – Baltimore Co., on exposed rocks. #Cladonia ochrochlora Flörke () ##Lendemer & Knapp (2007) - (1. Millington) #Cladonia parasitica (Hoffm.) Hoffm. () ##Skorepa ''et al.'' (1977) – Worcester Co., on pine stump. ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (2. Idylwild) #Cladonia peziziformis (With.) J.R. Laundon () ##Syn.: ''Cladonia capitata'' (Michx.) Spreng. ##Skorepa ''et al.'' (1977) – Kent Co., on embankment. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co., Greenbelt. #Cladonia piedmontensis G. Merr. () ##Skorepa ''et al.'' (1977) – Wicomico Co., on soil. ##E.G. Worthley Herbarium - Baltimore Co.; Wicomico Co. #Cladonia pleurota (Flörke) Schaerer () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. #Cladonia polycarpia G. Merr. () ##Lendemer & Knapp (2007) - (3. Chesapeake) #Cladonia polycarpoides Nyl. () ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (2. Idylwild) #Cladonia pyxidata (L.) Hoffm. () ##Skorepa ''et al.'' (1977) – Allegany Co., on bank of stream. ##E.G. Worthley Herbarium - Allegany Co., Green Ridge State Forest; Anne Arundel Co.; Carroll Co.; Washington Co. #Cladonia ramulosa (With.) J.R. Laundon () ##E.G. Worthley Herbarium - Worcester Co., Milburn Landing. ##Lendemer & Knapp (2007) - (2. Idylwild) #Cladonia rangiferina (L.) F.H. Wigg. () ##Skorepa ''et al.'' (1977) – Allegany Co., on soil. ##E.G. Worthley Herbarium - Calvert Co.; Wicomico Co. #Cladonia rappii A. Evans () ##Syn.: ''Cladonia calycantha'' Del. ''ex'' Nyl. ##Skorepa ''et al.'' (1977) – Charles Co., on soil. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Wicomico Co. #Cladonia ravenelii Tuck. () ##Biechele (2002) – lower eastern shore of Maryland. #Cladonia rei Schaerer () ##Syn.: ''Cladonia nemoxyna'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – Garrett Co., on rocky soil. ##E.G. Worthley Herbarium - Garrett Co. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Cladonia santensis Tuck. () ##Skorepa ''et al.'' (1977) – Dorchester Co., on soil. ##Biechele (2002) – lower eastern shore of Maryland. #Cladonia squamosa Hoffm. () ##Skorepa ''et al.'' (1977) – Frederick Co., on basalt outcrop. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Washington Co. ##Lendemer & Knapp (2007) - (6. Pocomoke) #Cladonia stellaris (Opiz) Pouzar & Vezda () ##Syn.: ''Cladonia alpestris'' (L.) Rabenh. ##Skorepa ''et al.'' (1977) – Garrett Co., on soil. #Cladonia strepsilis (Ach.) Grognot () ##Skorepa ''et al.'' (1977) – Prince George's Co., on shoulder of road. ##E.G. Worthley Herbarium - Prince George's Co. #Cladonia subcariosa Nyl. () ##Syns.: ''Cladonia clavulifera'' Vain., ''C. sobolescens'' Nyl. ''ex'' Vain. ##Skorepa ''et al.'' (1977) – Worcester Co., on sandy soil. ##Skorepa ''et al.'' (1977) – Kent Co., on soil. ##E.G. Worthley Herbarium - St. Mary's Co.; Wicomico Co. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co., Greenbelt. ##Lendemer & Knapp (2007) - (2. Idylwild) #Cladonia subtenuis (Abbayes) Mattick () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Allegany Co.; Calvert County; St. Mary's Co. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co. ##Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake), (4. Sharptown) #Cladonia turgida Hoffm. () ##Skorepa ''et al.'' (1977) – Wicomico Co., on soil. #Cladonia uncialis (L.) F.H. Wigg. () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Biechele (2002) – lower eastern shore of Maryland. #Coccocarpia palmicola (Sprengel) Arv. & D.J. Galloway () ##Syn.: ''Coccocarpia cronia'' (Tuck.) Vain. ##Skorepa ''et al.'' (1977) – Montgomery Co., on rock outcrop. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. #Coenogonium luteum (Dicks.) Kalb & Lücking () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Coenogonium pineti (Ach.) Kalb & Lücking () ##Syn.: ''Dimerella diluta'' (Pers.) Trevisan ##Skorepa ''et al.'' (1979) – on wood, other. ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Collema coccophorum Tuck. () ##Skorepa ''et al.'' (1979) – on acidic rock. #Collema conglomeratum Hoffm. () ##Skorepa ''et al.'' (1979) – on bark. #Collema furfuraceum (Arnold) Du Rietz () ##Skorepa ''et al.'' (1977) – Allegany Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – bark, acidic rock. ##E.G. Worthley Herbarium - Allegany Co., Terrapin Run, near base of tree trunk. #Collema fuscovirens (With.) J.R. Laundon () ##Syn.: ''Collema tuniforme'' (Ach.) Ach. ##Skorepa ''et al.'' (1979) – on calcareous rock. #Collema leptaleum Tuck. () ##Skorepa ''et al.'' (1979) – on bark. #Collema subflaccidum Degel. () ##Skorepa ''et al.'' (1979) – acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., Gunpowder River, on bark of Tulip Tree. #Collema undulatum Laurer ''ex'' Flotow () ##Skorepa ''et al.'' (1979) – on acidic rock. #Cyphelium tigillare (Ach.) Ach. () ##Skorepa ''et al.'' (1979) – on wood. #Dactylospora inquilina Hafellner () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) (on ''Pertusaria paratuberculifera'') #Dermatocarpon luridum (With.) J.R. Laundon () ##Syn.: ''Dermatocarpon fluviatile'' (G. Web.) Th. Fr. ##Skorepa ''et al.'' (1977) – Baltimore Co., on rocks. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Carroll Co., in stream bed; Frederick Co., on boulder in stream. ##E.C. Uebel Herbarium – Baltimore Co., Hollofield, on moist rock. #Dermatocarpon miniatum (L.) W. Mann () ##Skorepa ''et al.'' (1977) – Baltimore Co., on rock ledge. ##Skorepa ''et al.'' (1979) – on acidic rock, calcareous rock. ##E.G. Worthley Herbarium - Montgomery Co., Great Falls #Dibaeis baeomyces (L. f.) Rambold & Hertel () ##Syn.: ''Baeomyces roseus'' Pers. ##Skorepa ''et al.'' (1977) – Harford Co., on rock ledge. ##Skorepa ''et al.'' (1979) – on soil. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Howard Co. #Dimelaena oreina (Ach.) Norman () ##Skorepa ''et al.'' (1977) – Allegany Co., on sandstone outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. #Diploschistes scruposus (Schreber) Norman () ##Skorepa ''et al.'' (1979) – on acidic rock. #Dirinaria frostii (Tuck.) Hale & Culb. () ##Skorepa ''et al.'' (1977) – Allegany Co., on shale outcrops. ##Skorepa ''et al.'' (1979) – on acidic rock. #Endocarpon petrolepideum (Nyl.) Nyl. () ##E.C. Uebel Herbarium – Prince George's Co., Greenbelt, on hill of concrete (identified by Dr. Othmar Breuss, Vienna, Austria, Mar 2005). #Endocarpon pusillum Hedwig () ##Skorepa ''et al.'' (1977) – Washington Co., on chert. ##Skorepa ''et al.'' (1979) – on calcareous rock, cement. #Ephebe lanata (L.) Vainio () ##Skorepa ''et al.'' (1979) – on acidic rock. #Fissurina insidiosa Hook. & C. Knight () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Flavoparmelia baltimorensis (Gyelnik & Fóriss) Hale () ##Syn.: ''Parmelia baltimorensis'' Gyelnik & Fóriss ##Skorepa ''et al.'' (1977) – Baltimore Co., on rock outcrops. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Harford Co., Rocks State Park, on acidic rock. ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on boulders. #Flavoparmelia caperata (L.) Hale () ##Syn.: ''Parmelia caperata'' (L.) Ach. ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight, on rocks. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Calvert Co.; Frederick Co.; Worcester Co., on bark. ##E.C. Uebel Herbarium – Prince George's Co., on fallen tree limbs. ##Lendemer & Knapp (2007) - (4. Sharptown) #Flavopunctelia flaventior (Stirton) Hale () ##Syn.: ''Parmelia flaventior'' Stirt. ##Skorepa ''et al.'' (1977) – Garrett Co., on oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Allegany Co.; Garrett Co., Casselman Bridge State Park. #Flavopunctelia soredica (Nyl.) Hale () ##Syn.: ''Parmelia ulophyllodes'' (Vaino) Savicz ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Baltimore Co., Gunpowder State Park. ##E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. #Fuscopannaria leucophaea (Vahl) P.M. Jørg. () ##Syn.: ''Parmeliella microphylla'' (Sw.) Müll. Arg. ##Skorepa ''et al.'' (1979) – on acidic rock. #Fuscopannaria leucosticta (Tuck.) P.M. Jørg. () ##Syn.: ''Pannaria leucosticta'' (Tuck.) Tuck. ''ex'' Nyl. ##Skorepa ''et al.'' (1979) – on bark. #Gassicurtia vernicoma (Tuck.) Marbach () ##Syn.: ''Buellia vernicoma'' (Tuck.) Tuck. ##Skorepa ''et al.'' (1977) – (collected by Plitt) ##Skorepa ''et al.'' (1979) – on bark. #Graphis scripta (L.) Ach. () ##Skorepa ''et al.'' (1977) – Montgomery Co., on oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Baltimore Co., Pretty Boy Reservoir; Wicomico Co. ##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on tree bark. #Hafellia disciformis (Fr.) Marbach & H. Mayrhofer () ##Syn.: ''Buellia disciformis'' (Fr.) Mudd ##Skorepa ''et al.'' (1977) – Anne Arundel Co. ##Skorepa ''et al.'' (1979) – on bark. #Hertelidea botryosa (Fr.) Printzen & Kantvilas () ##Syn.: Lecidea botryosa (Fr.) Th. Fr. ##Skorepa ''et al.'' (1979) – on wood. #Heterodermia albicans (Pers.) Swinscow & Krog () ##Syn.: ''Heterodermia domingensis'' (Ach.) Trev. ##Skorepa ''et al.'' (1977) – Wicomico Co., on tree trunks. ##Skorepa ''et al.'' (1979) – on bark. #Heterodermia appalachensis (Kurok.) Culb. () ##Skorepa ''et al.'' (1977) – Baltimore Co., on trunk of oak. #Heterodermia granulifera (Ach.) Culb. () ##Skorepa ''et al.'' (1977) – Montgomery Co., on trunk of Walnut tree. ##Skorepa ''et al.'' (1979) – on bark. #Heterodermia hypoleuca (Muhl.) Trevisan () ##Skorepa ''et al.'' (1977) – Frederick Co, on oak. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. #Heterodermia obscurata (Nyl.) Trevisan () ##Skorepa ''et al.'' (1977) – Charles Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., Gunpowder Falls, on tree trunk. ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) #Heterodermia speciosa (Wulfen) Trevisan () ##Syn.: ''Heterodermia tremulans'' (Müll. Arg.) W. Culb. ##Skorepa ''et al.'' (1977) – Washington Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., Pretty Boy Dam. ##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) #Hymenelia epulotica (Ach.) Lutzoni () ##Syn.: ''Ionaspis epulotica'' (Ach.) Blomb. & Forssell ##Skorepa ''et al.'' (1979) – on acidic rock. #Hyperphyscia adglutinata (Flörke) H. Mayrh. () ##Syn.: ''Physciopsis adglutinata'' (Flörke) M. Choisy ##Skorepa ''et al.'' (1979) – on bark. #Hyperphyscia syncolla (Tuck. ''ex'' Nyl.) Kalb () ##Syns.: ''Physcia syncolla'' Tuck. ''ex'' Nyl., ''Physciopsis syncolla'' (Tuck. ''ex'' Nyl.) Poelt ##Skorepa ''et al.'' (1977) – Wicomico Co., on oak trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. #Hypocenomyce scalaris (Ach.) M. Choisy () ##Syn.: ''Lecidea scalaris'' (Ach. ''ex'' Lilj.) Ach. ##Skorepa ''et al.'' (1979) – on bark, wood. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight, on trunk of pine. #Hypogymnia krogiae Ohlsson () ##Skorepa ''et al.'' (1977) – Garrett Co., on conifer bark. ##Skorepa ''et al.'' (1979) – on bark. #Hypogymnia physodes (L.) Nyl. () ##Skorepa ''et al.'' (1977) – Garrett Co., on tree trunks. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. #Hypotrachyna livida (Taylor) Hale () ##Syn.: ''Parmelia livida'' Taylor ##Skorepa ''et al.'' (1977) – Sommerset Co., on branches of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Wicomico Co.; Worcester Co., Milburn Landing, on branches. ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) #Hypotrachyna osseoalba (Vainio) Park & Hale () ##Syn.: ''Parmelia formosana'' Zahlbr. ##Skorepa ''et al.'' (1977) – Dorchester Co., on oak trunk. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (4. Sharptown) #Imshaugia aleurites (Ach.) S.F. Meyer () ##Syn.: ''Parmeliopsis aleurites'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – Garrett Co., on oak trunk. ##Skorepa ''et al.'' (1979) – on bark, acidic rock, wood. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight, on Virginia pines. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight, on trunks of pines. #Imshaugia placorodia (Ach.) S.F. Meyer () ##Syn.: ''Parmeliopsis placorodia'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – Harford Co., on pine trees. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight, on pine branches. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight, on branches of Virginia pines. #Julella fallaciosa (Arnold) R.C. Harris (Not lichenized.) () ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of Tulip Tree. #Lasallia papulosa (Ach.) Llano () ##Syn.: ''Umbilicaria papulosa'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – Baltimore Co., on rocks on hillside. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls; Montgomery Co., Great Falls. #Lasallia pensylvanica (Hoffm.) Llano () ##Syn.: ''Umbilicaria pensylvanica'' Hoffm. ##Skorepa ''et al.'' (1977) – Harford Co., on rock outcrops. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Washington Co., Wash. Monument State Park, on rocks. #Lasallia pustulata (L.) Mérat () ##E.G. Worthley Herbarium - Frederick Co., South Mt.; Montgomery Co., Sugarloaf Mt., on boulders. #Lecanora albella (Pers.) Ach. var. albella () ##E.G. Worthley Herbarium - Worcester Co., on bark of ''Pinus taeda''. #Lecanora cadubriae (A. Massal.) Hedl. () ##Skorepa ''et al.'' (1979) – on bark. #Lecanora caesiorubella Ach. subsp. caesiorubella () ##Skorepa ''et al.'' (1977) – Harford Co., on trunk of oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Wicomico Co. #Lecanora campestris (Schaerer) Hue () ##Skorepa ''et al.'' (1977) – Allegany Co., on shale outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. #Lecanora chlarotera Nyl. () ##Skorepa ''et al.'' (1977) – Calvert Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. #Lecanora cinereofusca H. Magn. () ##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) #Lecanora dispersa (Pers.) Sommerf. () ##Skorepa ''et al.'' (1977) – Washington Co., on stone wall. ##Skorepa ''et al.'' (1979) – on calcareous rock, cement, other. ##E.G. Worthley Herbarium - Baltimore Co.; Washington Co., on rock outcrops. #Lecanora expallens Ach. () ##Syn.: ''Lecanora conizea'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – St. Mary's Co., on trunks of Black Locust. ##Skorepa ''et al.'' (1979) – on bark, wood. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; St. Mary' Co., on trunk of Black Locust. #Lecanora hagenii (Ach.) Ach. () ##Skorepa ''et al.'' (1977) – Frederick Co., on old timbers. ##Skorepa ''et al.'' (1979) – on wood. #Lecanora hybocarpa (Tuck.) Brodo () ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (1. Millington), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) #Lecanora imshaugii Brodo () ##Biechele (2002) – lower eastern shore of Maryland. #Lecanora minutella Nyl. () ##Lendemer & Knapp (2007) - (2. Idylwild) #Lecanora muralis (Schreber) Rabenh. () ##Skorepa ''et al.'' (1977) – Montgomery Co., on rock ledges. #Lecanora muralis var. versicolor (Pers.) Tuck. () ##Syn.: ''Lecanora versicolor'' (Pers.) Ach. ##Skorepa ''et al.'' (1977) – Washington Co., on stone wall. ##Skorepa ''et al.'' (1979) – on acidic rock. ##Skorepa ''et al.'' (1979) – on acidic rock, calcareous rock. ##E.G. Worthley Herbarium - Washington Co., C & 0 canal, on shale. #Lecanora polytropa (Hoffm.) Rabenh. () ##Skorepa ''et al.'' (1979) – on acidic rock. #Lecanora pulicaris (Pers.) Ach. () ##Syn.: ''Lecanora coilocarpa'' (Ach.) Nyl. ##Skorepa ''et al.'' (1977) – Calvert Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. #Lecanora strobilina (Spreng.) Kieffer () ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple; Prince George's Co., on bark of pines. ##Lendemer & Knapp (2007) - (2. Idylwild) #Lecanora subpallens Zahlbr. - () ##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown) #Lecanora thysanophora R.C. Harris () ##Thomas E. Wilson, III (4 Dec 2006) – IMG_9960.JPG, photographed on tree trunk in woodland on eastern side of Baltimore County, MD. ##Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.) #Lecanora xylophila Hue () ##Syn.: ''Lecanora laevis'' Poelt (N.A. records are ''L. xylophila'') ##Skorepa ''et al.'' (1977) – Baltimore Co., on wave-washed timbers. ##Skorepa ''et al.'' (1979) – on wood. #Lecidea cyrtidia Tuck. () ##Skorepa ''et al.'' (1977) – Washington Co., on rocks. ##Skorepa ''et al.'' (1979) – on acidic rock. #Lecidea plebeja Nyl. () ##Syn.: ''Lecidea myriocarpoides'' Nyl. ##Skorepa ''et al.'' (1979) – on wood. ##Lendemer & Knapp (2007) - (2. Idylwild) #Lecidella stigmatea (Ach.) Hertel & Leuckert () ##Syn.: Lecidea stigmatea'' Ach. ##Skorepa ''et al.'' (1979) – on acidic rock. #Lepraria caesiella R.C. Harris (Not Determined ) ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) #Lepraria aff. incana (L.) Ach. (Not Determined ) ##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild) #Lepraria lobificans Nyl. (Not Determined ) ##Syn.: ''Lepraria finkii'' (B. de Lesd.) R.C. Harris ##E.G. Worthley Herbarium - Baltimore Co., Gunpowder River Area, on ''Quercus alba''. ##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, rock near water. ##Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake) #Lepraria membranacea (Dickson) Vainio (Not Determined ) ##Syn.: ''Leproloma membranaceum'' (Dickson) Vainio ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. #Lepraria neglecta (Nyl.) Erichsen (Not Determined ) ##Syn.: ''Lepraria zonata'' Brodo = ''L.caesioalba'' or ''L. neglecta''. ##Skorepa ''et al.'' (1977) – Baltimore Co., on acid rocks. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls; Montgomery Co., Great Falls. #Leptogium azureum (Sw.) Mont. () ##Skorepa ''et al.'' (1977) – Montgomery Co., Plummers Is. (collected by Fink). ##Skorepa ''et al.'' (1979) – on acidic rock. #Leptogium cyanescens (Rabenh.) Körber () ##Skorepa ''et al.'' (1977) – Worcester Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Baltimore Co., Gunpowder River, on vertical rocks; Frederick Co., Cunningham Falls. ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Leptogium lichenoides (L.) Zahlbr. () ##Skorepa ''et al.'' (1977) – Allegany Co., on bark of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. #Leptogium phyllocarpum (Pers.) Mont. () ##Biechele (2002) – lower eastern shore of Maryland. #Leptogium subtile (Schrader) Torss. () ##Syn.: ''Leptogium minutissimum'' (Flörke) Fr. ##Skorepa ''et al.'' (1977) – Montgomery Co., on rock ledge. ##Skorepa ''et al.'' (1979) – on acidic rock. #Lichenoconium erodens M.S. Christ. & D. Hawksw. (''Ascomycetes'' ) ##Lendemer & Knapp (2007) - (5. Hickory Pt.) (on ''Lecanora cinereofusca'') #Lichenodiplis lecanorae (Vouaux) Dyko & D. Hawksw. (''Ascomycetes'' ) ##E.C. Uebel Herbarium – Baltimore Co., Libetry Reservoir, a specimen of ''Pertusaria xanthodes'' U-243, was collected growing on a small dead oak branch. This crustose lichen contained a lichenicolous fungus and a sample of this fungus was sent to the Farlow Herbarium where it was forwarded to Dr. David Hawksworth, who identified it as ''Lichenodiplis lecanorae''. #Lobaria pulmonaria (L.) Hoffm. () ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. #Lobaria quercizans Michaux () ##Skorepa ''et al.'' (1977) – Garrett Co., on trunk of deciduous tree. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Loxospora pustulata (Brodo & Culb.) R.C. Harris () ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) #Melanelia culbersonii (Hale) Thell () ##Syn.: ''Cetraria culbersonii'' Hale ##Skorepa ''et al.'' (1977) – Allegany Co., on exposed rock. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Allegany Co., Dans Rock Overlook. #Melanelixia subaurifera (Nyl.) O. Blanco ''et al.'' () ##Syns.: ''Parmelia subaurifera'' Nyl., ''Melanelia subaurifera'' (Nyl.) Essl. ##Skorepa ''et al.'' (1977) – Allegany Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. #Melanohalea exasperata (De Not.) O. Blanco ''et al.''. () ##Syns.: ''Parmelia exasperata'' De Not., ''Melanelia exasperata'' (De Not.) Essl. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Baltimore Co., Owings Mills. #Metamelanea melambola (Tuck.) Henssen () ##Syn.''Pyrenopsis melambola'' (Tuck.) Tuck. ##Skorepa ''et al.'' (1979) – on calcareous rock. #Micarea erratica (Körber) Hertel, Rambold & Pietschmann () ##Syn.: ''Lecidea erratica'' Körber ##Skorepa ''et al.'' (1977) – Baltimore Co., on pebbles. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Garrett Co., Carey Run, in open field. ##Lendemer & Knapp (2007) - (2. Idylwild) #Minutoexcipula mariana V. Atienza * (on ''Pertusaria'') (Not Determined ) ##Lendemer & Knapp (2007) - (4. Sharptown) #Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth () ##Syn.: ''Lecidea berengeriana'' (Massal.) Nyl. ##Skorepa ''et al.'' (1977) – Frederick Co., on oak trunks. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Montgomery Co., Great Falls, on old wood. #Myelochroa aurulenta (Tuck.) Elix & Hale () ##Syns: ''Parmelia aurulenta'' Tuck. ##Skorepa ''et al.'' (1977) – Baltimore Co., on rocks. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., along 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 () ##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 () ##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 () ##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 () ##Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.), (6. Pocomoke) #Nephroma helveticum Ach. subsp. helveticum () ##Skorepa ''et al.'' (1977) – Montgomery Co., Plummers Is. (collected by Fink). ##Skorepa ''et al.'' (1979) – on acidic rock. #Normandina pulchella (Borrer) Nyl. () ##Skorepa ''et al.'' (1979) – on bark. #Ochrolechia androgyna (Hoffm.) Arnold () ##Skorepa ''et al.'' (1977) – Anne Arundel Co. ##Skorepa ''et al.'' (1979) – on acidic rock. #Ochrolechia cinera Chev. () ##Biechele (2002) – lower eastern shore of Maryland. #Ochrolechia pseudopallescens Brodo () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Ochrolechia trochophora var. trochophora (Vainio) Oshio () ##Syn.: ''Ochrolechia rosella'' (Müll. Arg.) Vers. ##Biechele (2002) – lower eastern shore of Maryland. #Ochrolechia yasudae Vainio () ##Skorepa ''et al.'' (1977) – Frederick Co. (collected by Plitt). ##Skorepa ''et al.'' (1979) – on acidic rock. #Opegrapha varia Pers. () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Opegrapha viridis Pers. () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Opegrapha vulgata Ach. () ##Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake), (4. Sharptown) #Pannaria conoplea (Ach.) Bory () ##Syn.: ''Pannaria pityrea auct. ##Skorepa ''et al.'' (1979) – on bark. #Pannaria lurida (Mont.) Nyl. () ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. #Parmelia saxatilis (L.) Ach. () ##Skorepa ''et al.'' (1977) – Frederick Co., in mature oak woods. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., along Gunpowder River, on bark of ''Quercus velutina''. #Parmelia squarrosa Hale () ##Skorepa ''et al.'' (1977) – Garrett Co., on ''Acer''. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (6. Pocomoke) #Parmelia sulcata Taylor () ##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 () ##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 () ##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. () ##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 () ##Syn.: ''Parmeliopsis diffusa'' (Weber) Riddle ##E.G. Worthley Herbarium - Baltimore Co., Owings Mills. #Parmeliopsis subambigua Gyelnik () ##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 () ##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 () ##Syn.: ''Parmotrema perlatum'' (Huds.) Choisy ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple, on oak limb. #Parmotrema crinitum (Ach.) M. Choisy () ##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 () ##Syn.: ''Parmelia dilatata'' Vainio ##Skorepa ''et al.'' (1977) – Dorchester Co., on trunks of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. #Parmotrema eurysacum (Hue) Hale () ##Syn.: ''Parmelia eurysaca'' Hue ##Skorepa ''et al.'' (1977) – Baltimore Co. (collected by Plitt). ##Skorepa ''et al.'' (1979) – on bark. #Parmotrema gardneri (Dodge) Serux. () ##Biechele (2002) – lower eastern shore of Maryland. #Parmotrema hypoleucinum (B. Stein) Hale () ##Biechele (2002) – lower eastern shore of Maryland. #Parmotrema hypoleucinum (J. Steiner) Hale () ##Lendemer & Knapp (2007) - (4. Sharptown), (6. Pocomoke) #Parmotrema hypotropum (Nyl.) Hale () ##Syn.: ''Parmelia hypotropa'' Nyl. ##Skorepa ''et al.'' (1977) – Kent Co., on trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Kent Co., on trees; Somerset Co., on deciduous trees; Wicomico Co.; Worcester Co., on bark of ''Pinus taeda''. ##E.C. Uebel Herbarium – Baltimore Co.; Prince George's Co., on bark and boulder. ##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown), (6. Pocomoke) #Parmotrema margaritatum (Hue) Hale () ##Syn.: ''Parmelia margaritata'' Hue ##Skorepa ''et al.'' (1979) – on bark. #Parmotrema perforatum (Jacq.) A. Massal. () ##Syn.: ''Parmelia perforata'' (Jacq.) Ach. ##Skorepa ''et al.'' (1977) – Charles Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Prince George's Co., on bark of oak; Worcester Co., Milburn Landing. ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Parmotrema reticulatum (Taylor) M. Choisy () ##Syns.: ''Parmelia reticulata'' Taylor, ''Rimelia reticulata'' (Taylor) Hale & Fletcher ##Skorepa ''et al.'' (1977) – Charles Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Worcester Co., on bark of ''Taxodium'' and ''Acer rubrum''. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Parmotrema stuppeum (Taylor) Hale () ##Syn.: ''Parmelia stuppea'' Taylor ##Skorepa ''et al.'' (1977) – Garrett Co., on trunk of oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. #Parmotrema subisidiosum (Müll. Arg.) Hale ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) #Parmotrema submarginale (Michx.) DePriest & Hale () ##Syn.: ''Parmelia michauxiana'' Zahlbr. ##Skorepa ''et al.'' (1977) – Charles Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Calvert Co., Battle Creek Cypress Swamp, on bark; Worcester Co., Milburn Landing, on deciduous trees. ##Lendemer & Knapp (2007) - (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) #Parmotrema subtinctorium (Zahlbr.) Hale () ##Syn.: ''Parmelia subcrinita'' Nyl. ##Skorepa ''et al.'' (1977) – Somerset Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. #Parmotrema xanthinum (Müll. Arg.) Hale () ##Syn.: ''Parmelia xanthina'' (Müll. Arg.) Vainio ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (6. Pocomoke) #Peltigera aphthosa (L.) Willd. () ##Skorepa ''et al.'' (1977) – No County, (Thomson, 1940). #Peltigera canina (L.) Willd. () ##Skorepa ''et al.'' (1977) – Garrett Co., with moss on sandstone. ##E.G. Worthley Herbarium - Garrett Co., Casselman Bridge State Park, on sandstone rocks; Wicomico Co., on sandy soil. #Peltigera didactyla (With.) J. R. Laundon () ##Syn.: ''Peltigera spuria'' (Ach.) DC. ##Skorepa ''et al.'' (1977) – Washington Co., on rock in seepage area. #Peltigera elisabethae Gyelnik () ##Skorepa ''et al.'' (1977) – Baltimore Co., with moss on wet rocks. #Peltigera evansiana Gyelnik () ##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Plitt). #Peltigera horizontalis (Hudson) Baumg. () ##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Merrill 1906). #Peltigera neckeri Müll. Arg. () ##Biechele (2002) – lower eastern shore of Maryland. #Peltigera polydactylon (Necker) Hoffm. () ##Skorepa ''et al.'' (1977) – Garrett Co., on moss covered rocks. #Peltigera praetextata (Flörke ''ex'' Sommerf.) Zopf () ##Skorepa ''et al.'' (1977) – Dorchester Co., at base of tree. ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (3. Chesapeake) #Peltigera rufescens (Weiss) Humb. () ##Biechele (2002) – lower eastern shore of Maryland. #Peltula euploca (Ach.) Poelt () ##Skorepa ''et al.'' (1979) – on soil. #Pertusaria amara (Ach.) Nyl. () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria epixantha R.C. Harris () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Pertusaria globularis (Ach.) Tuck. () ##Skorepa ''et al.'' (1979) – on other. #Pertusaria hypothamnolica Dibben () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria macounii (Lamb) Dibben () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria multipunctoides Dibben () ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on trunk of ''Carya''. ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Pertusaria ophthalmiza (Nyl.) Nyl. () ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Pertusaria paratuberculifera Dibben () ##''Pertusaria tuberculifera'' Nyl is misidentification for N.A., most specimens are ''P. paratuberculifera''. ##Skorepa ''et al.'' (1977) – Frederick Co., on oak trunks. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) #Pertusaria plittiana Erichsen () ##Skorepa ''et al.'' (1979) – on acidic rock. #Pertusaria propinqua Müll. Arg. () ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (6. Pocomoke) #Pertusaria pustulata (Ach.) Duby () ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Prince George's Co., on dead limb of deciduous tree. ##Lendemer & Knapp (2007) - (1. Millington) #Pertusaria rubefacta Erichsen () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria subpertusa Brodo () ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) #Pertusaria tetrathalamia (Fée) Nyl. () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria texana Müll. Arg. () ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild) #Pertusaria trachythallina Erichsen () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria velata (Turner) Nyl. () ##Skorepa ''et al.'' (1977) – Frederick Co., in oak woods. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) #Pertusaria waghornei Hulting () ##Skorepa ''et al.'' (1979) – on bark. #Pertusaria xanthodes Müll. Arg. () ##Skorepa ''et al.'' (1977) – Harford Co., on tree bark. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Calvert Co.; Frederick Co.; Washington Co., on bark of ''Quercus velutina''. ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of dead oak branch. #Phaeocalicium curtisii (Tuck.) Tibell () ##E.G. Worthley Herbarium - Baltimore Co., on twigs of ''Rhus glabra''. #Phaeocalicium polyporaeum (Nyl.) Tibell () ##E.C. Uebel Herbarium – a specimem of Violet Toothed Polypore (biforme'' (Fries) Ryvarden ) was collected with ''Flavoparmelia caperata'' (U-65) growing on the bark of a fallen oak tree at Liberty Reservoir in Baltimore County. The ''T. biforme'' had a stubble lichen growing on it which was identified by Dr. Steven Selva as ''Phaeocalicium polyporaeum''. ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) #Phaeographis inusta (Ach.) Müll. Arg. () ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) #Phaeophyscia adiastola (Essl.) Essl. () ##Syns.: ''Physcia orbicularis'' (Necker) Poetsch; ''Phaeophyscia orbicularis'' (Necker) Moberg ##Skorepa ''et al.'' (1977) – Allegany Co., on oak trunk. ##Skorepa ''et al.'' (1979) – on bark, acidic rock, other. ##E.G. Worthley Herbarium – Worcester Co., on bark of ''Taxodium''; Frederick Co., Cunningham Falls; Baltimore Co., Church of the Brethren. #Phaeophysica ciliata (Hoffm.) Moberg () ##Syn.: ''Physcia ciliata'' (Hoffm.) Du Rietz ##Skorepa ''et al.'' (1977) – Caroline Co., on cement bridge. ##Skorepa ''et al.'' (1979) – on bark. #Phaeophyscia hirsuta (Mereschk.) Essl. () ##Syns.: ''Physcia hirsuta'' Mereschk., ''Phaeophyscia cernohorskyi'' (Nádv.) Essl. ##Skorepa ''et al.'' (1979) – on cement. #Phaeophyscia hirtella Essl. () ##Skorepa ''et al.'' (1979) – on bark. #Phaeophyscia hispidula (Ach.) Essl. () ##Syn.: ''Phaeophyscia imbricata'' Vainio ##Skorepa ''et al.'' (1979) – on bark. #Phaeophyscia pusilloides (Zahlbr.) Essl. () ##Syn.: ''Physcia pusilloides'' Zahlbr. ##Skorepa ''et al.'' (1977) – Frederick Co., on trees. ##Skorepa ''et al.'' (1979) – on bark. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., on bark of Norway Maple; #Phaeophyscia rubropulchra (Degel.) Essl. () ##Syn.: ''Physcia orbicularis'' f. ''rubropulchra'' Degel. ##Skorepa ''et al.'' (1977) – Garrett Co., in upland woods. ##Skorepa ''et al.'' (1979) – on bark, acidic rock, other. ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., Liberty Reservoir, on trunk of Tulip tree. ##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild) #Phlyctis ludoviciensis (Müll. Arg.) Lendemer () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Physcia adscendens (Fr.) H. Olivier () ##Skorepa ''et al.'' (1977) – Allegany Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, calcareous rock. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., St. Thomas Cemetery, on gravestone. #Physcia aipolia (Ehrh. ''ex'' Humb.) Fürnr. var. aipolia () ##Skorepa ''et al.'' (1977) – Worcester Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Frederick Co., Cunningham Falls. ##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on bark; Baltimore Co., on Norway Maple. #Physcia americana G. Merr. () ##Syn.: ''Physcia tribacoides'' Nyl. ##Skorepa ''et al.'' (1977) – Worcester Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, acidic rock, calcareous rock. ##E.G. Worthley Herbarium - Baltimore Co., Grace Methodist Church, Gunpowder River, on Tulip Tree; Frederick Co., Cunningham Falls. ##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.) #Physcia millegrana Degel. () ##Skorepa ''et al.'' (1977) – Garrett Co., on oak. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Calvert Co.; Wicomico Co.; Carroll Co., Falls Realty Company, on cement steps. ##E.C. Uebel Herbarium – Prince Georges Co., on dead limb; Carroll Co., Liberty Reservoir, on bark. ##Lendemer & Knapp (2007) - (2. Idylwild) #Physcia phaea (Tuck.) J.W. Thomson () ##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Plitt 1909) ##Skorepa ''et al.'' (1979) – on acidic rock. #Physcia pseudospeciosa J.W. Thomson () ##Skorepa ''et al.'' (1977) – Baltimore Co., on acid rocks. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., near Gunpowder River, on vertical acidic rocks. #Physcia pumilior R.C. Harris () ##Lendemer & Knapp (2007) - (2. Idylwild) #Physcia stellaris (L.) Nyl. () ##Skorepa ''et al.'' (1977) – Baltimore Co., on oak. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple; Prince George's Co., on bark. #Physcia subtilis Degel. () ##Skorepa ''et al.'' (1977) – Montgomery Co., on rock ledges. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. #Physciella chloantha (Ach.) Essl. () ##Syn.: ''Physcia luganensis'' Mereschk. ##Skorepa ''et al.'' (1977) – Queen Anne's Co., on cement bridge. ##Skorepa ''et al.'' (1979) – on bark, cement. ##E.C. Uebel Herbarium – Prince George's Co., along bike path, on concrete; on tree branch. #Physconia detersa (Nyl.) Poelt () ##Skorepa ''et al.'' (1979) – on bark, calcareous rock, cement. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Green Spring Valley, on brick wall; on old cement bridge. #Placidium arboreum (Schwein. ''ex'' Michener) Lendemer () ##Syn.: ''Dermatocarpon tuckermanii'' (Rav.) Zahlbr.; ''Placidium tuckermanii'' (Ravenel ''ex'' Mont.) Breuss ##Skorepa ''et al.'' (1977) – Allegany Co., base of White Oak. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Allegany Co., Green Ridge State Forest, on base of White Oak. #Placidium lachneum (Ach.) Breuss () ##E.G. Worthley Herbarium - Lichens of Soldiers Delight. #Placynthiella uliginosa (Schrader) Coppins & P. James () ##Syn.: ''Lecidea uliginosa'' (Schrad.) Ach. ##Skorepa ''et al.'' (1977) – Dorchester Co., on oak trunk. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (2. Idylwild) #Placynthium nigrum (Hudson) Gray () ##Skorepa ''et al.'' (1977) – Garrett Co., on block of cement. ##Skorepa ''et al.'' (1979) – on calcareous rock, cement. ##E.G. Worthley Herbarium - Baltimore Co., St. Thomas Church Cemetery, on rock wall. #Platismatia tuckermanii (Oakes) Culb. & C. Culb. () ##Skorepa ''et al.'' (1977) – Garrett Co., on sandstone boulder. ##Skorepa ''et al.'' (1979) – on bark, acidic rock, wood #Polysporina simplex (Davies) Vezda () ##Syn.: ''Sarcogyne simplex'' (Davies) Nyl. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Howard Co., on rock outcrop. #Porina cestrensis (Tuck. ''ex'' Michener) Müll. Arg. () ##Skorepa ''et al.'' (1979) – on bark. #Porina heterospora (Fink ''ex'' J. Hedrick) R.C. Harris () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Porpidia albocaerulescens (Wulfen) Hertel & Knoph () ##Syn.: ''Lecanora albocaerulescens'' (Wulf.) Ach. ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Baltimore Co., near small bridge, on Wissahickon schist; Frederick Co.; Garrett Co., on rocks along Big Run. ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on sandstone boulder. #Porpidia crustulata? (Ach.) Hertel & Knoph () ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Porpidia macrocarpa (DC.) Hertel & A. J. Schwab () ##Syn.: ''Lecidea macrocarpa'' (DC.) Steud. ##Skorepa ''et al.'' (1977) – Garrett Co., on sandstone. ##Skorepa ''et al.'' (1979) – on acidic rock. #Protoblastenia rupestris (Scop.) J. Steiner () ##Skorepa ''et al.'' (1979) – on calcareous rock, cement. #Pseudevernia consocians (Vainio) Hale & Culb. () ##Syn.: ''Parmelia furfuracea'' (L.) Ach. ##Skorepa ''et al.'' (1977) – Garrett Co., on upper branches of Hemlock. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Baltimore Co., Owings Mills. #Pseudosagedia cestrensis (Tuck. ''ex'' E. Michener) R.C. Harris () ##Lendemer & Knapp (2007) - (2. Idylwild) #Pseudosagedia raphidosperma (Müll. Arg.) R.C. Harris () ##Lendemer & Knapp (2007) - (4. Sharptown) #Psora decipiens (Hedwig) Hoffm. () ##Syn.: ''Lecidea decipiens'' (Hedwig) Ach. ##Skorepa ''et al.'' (1979) – on soil. #Psora russellii (Tuck.) A. Schneider () ##Syn.: ''Lecidea russellii'' Tuck. ##Skorepa ''et al.'' (1977) – Frederick Co., on conglomerate boulders. ##Skorepa ''et al.'' (1979) – on calcareous rock. #Psorotichia schaereri (A. Massal.) Arnold () ##Skorepa ''et al.'' (1979) – on cement. #Psorula rufonigra (Tuck.) Gotth. Schneider () ##Syn.: ''Lecidea rufonigra'' (Tuck.) Nyl. ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Skorepa ''et al.'' (1979) – on acidic rock. #Punctelia appalachensis (Culb.) Krog () ##Syn.: ''Parmelia appalachensis'' Culb. ##Skorepa ''et al.'' (1979) – on bark. #Punctelia bolliana (Müll. Arg.) Krog () ##Syn.: ''Parmelia bolliana'' Müll. Arg. ##Skorepa ''et al.'' (1979) – on bark. #Punctelia borreri (Sm.) Krog () ##Syn.: ''Parmelia borreri'' (Sm.) Turner ##Skorepa ''et al.'' (1979) – on bark. #Punctelia missouriensis G. Wilh. & Ladd ##Lendemer & Knapp (2007) - (2. Idylwild) #Punctelia perreticulata (Räsänen) G. Wilh. & Ladd () ##Syns.: ''Punctelia subrudecta'' (Nyl.) Krog, ''Parmelia subrudecta'' Nyl. ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Owings Mills, on bark. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., on bark of Norway Maple. ##Lendemer & Knapp (2007) - (4. Sharptown) #Punctelia rudecta (Ach.) Krog () ##Syn.: ''Parmelia rudecta'' Ach. ##Skorepa ''et al.'' (1977) – Caroline Co., on trunks of trees. ##Skorepa ''et al.'' (1979) – on bark, acidic rock. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Ivy Mill Road, on bark; Calvert Co.; Wicomico Co.; Carroll Co., on bark of Tulip Tree. ##E.C. Uebel Herbarium – Prince George's Co., on dead limb; Carroll Co., Liberty Reservoir, on bark. ##Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.), (6. Pocomoke) #Pycnothelia papillaria Dufour () ##Skorepa ''et al.'' (1977) – Prince George's Co., along dirt road. ##Skorepa ''et al.'' (1979) – on soil. ##Biechele (2002) – lower eastern shore of Maryland. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Pyrenula pseudobufonia (Rehm) R.C. Harris () ##Syn.: ''Pyrenula neglecta'' R.C. Harris ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.) #Pyrenula punctella Trevis. () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Pyrenula subelliptica (Tuck.) R.C. Harris () ##Syn.: ''Pyrenula imperfecta'' (Ellis & Everh.) R.C. Harris ##Skorepa ''et al.'' (1979) – on bark. #Pyrrhospora varians (Ach.) R.C. Harris () ##Syn.: ''Lecidea varians'' Ach. ##Skorepa ''et al.'' (1977) – Worcester Co., on twigs of ''Myrica''. ##Skorepa ''et al.'' (1979) – on bark. ##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) #Pyxine caesiopruinosa (Tuck.) Imshaug () ##Skorepa ''et al.'' (1977) – Howard Co., on tree. ##Skorepa ''et al.'' (1979) – on bark. ##E.G. Worthley Herbarium - Baltimore Co., on bark of ''Juglans nigra''; Carroll Co., on bark of ''Juglans nigra''. #Pyxine sorediata (Ach.) Mont. () ##Skorepa ''et al.'' (1977) – Garrett Co., on oak. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##E.G. Worthley Herbarium – Frederick Co.; Baltimore Co., growing on a sterile crust, ''Pertusaria''? ##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on tree root; Ridge Road, on bark Norway Maple. ##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown) #Pyxine subcinerea Stirton () ##E.C. Uebel Herbarium – Prince George's Co., on oak bark; Baltimore Co., on maple bark. #Ramalina americana? Hale () ##Biechele (2002) – lower eastern shore of Maryland. #Ramalina fastigiata (Pers.) Ach. () ##Skorepa ''et al.'' (1977) – Worcester Co., on branches of deciduous trees. ##Skorepa ''et al.'' (1979) – on bark. #Ramalina willeyi R. Howe () ##Skorepa ''et al.'' (1977) – Worcester Co., on branches of deciduous trees. ##Biechele (2002) – lower eastern shore of Maryland. #Ramonia microspora Vězda () ##Lendemer & Knapp (2007) - (2. Idylwild) #Rhizocarpon concentricum (Davies) Beltr. () ##E.G. Worthley Herbarium - Garrett Co., Swallow Falls State Forest, on sandstone. #Rhizocarpon eupetraeum (Nyl.) Arnold () ##Syn.: ''Rhizocarpon intermedium'' Degel. ##Skorepa ''et al.'' (1979) – on acidic rock. #Rhizocarpon geographicum (L.) DC. () ##Skorepa ''et al.'' (1979) – on acidic rock. #Rhizocarpon obscuratum (Ach.) A. Massal. () ##Skorepa ''et al.'' (1977) – Baltimore Co., on rock outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. #Rhizoplaca chrysoleuca (Sm.) Zopf () ##Syn.: ''Lecanora rubina'' (Vill.) Ach.; ''Lecanora chrysoleuca'' (Sm.) Ach. ##Skorepa ''et al.'' (1977) – Montgomery Co., on rock ledges. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Frederick Co., Mt. Catoctin Park; Montgomery Co., Great Falls, on rocks. #Rimelia subisidiosa (Müll. Arg.) Hale & Fletcher () ##Syn.: ''Parmelia subisidiosa'' (Müll. Arg.) C.W. Dodge ##Skorepa ''et al.'' (1979) – on bark. #Rinodina applanata H. Magn. () ##Skorepa ''et al.'' (1979) – on bark. #Rinodina ascociscana Tuck. () ##Skorepa ''et al.'' (1979) – on bark. #Rinodina exigua (Ach.) Gray () ##Skorepa ''et al.'' (1979) – on bark. #Rinodina ochrocea Willey ''ex'' Fink () ##Skorepa ''et al.'' (1979) – on acidic rock. #Rinodina oxydata (A. Massal.) A. Massal. () ##Skorepa ''et al.'' (1979) – on acidic rock. #Rinodina papillata H. Magn. () ##Skorepa ''et al.'' (1979) – on bark. #Rinodina subminutaH. Magn. () ##Skorepa ''et al.'' (1979) – on bark. #Sarcogyne clavus (DC.) Kremp. () ##Skorepa ''et al.'' (1979) – on acidic rock. #Sarcogyne regularis Körber () ##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. () ##Syn.: ''Biatorella campestris'' (Fr.) Almq. ##Skorepa ''et al.'' (1979) – on soil. #Schismatomma glaucescens (Nyl. ''ex'' Willey) R.C. Harris () ##Lendemer & Knapp (2007) - (4. Sharptown) #Scoliciosporum chlorococcum (Stenh.) Vezda () ##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 () ##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. () ##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on ''Aspicilia caesiocinerea''. #Sticta fuliginosa (Hoffm.) Ach. () ##E.G. Worthley Herbarium - Frederick Co., along Appalachian Trail, on soil. #Teloschistes chrysophthalmus (L.) Th. Fr. () ##Skorepa ''et al.'' (1979) – on bark. #Tephromela atra (Huds.) Hafellner () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Thelidium minutulum Körber () ##Lendemer & Knapp (2007) - (5. Hickory Pt.) #Thelotrema monospermum R.C. Harris () ##Lendemer & Knapp (2007) - (6. Pocomoke) #Thelotrema subtile Tuck. () ##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) #Trapelia coarctata (Sm.) M. Choisy () ##Syn.: ''Lecidea coarctata (Sm.) Nyl. ##Skorepa ''et al.'' (1979) – on acidic rock. #Trapeliopsis flexuosa (Fr.) Coppins & P. James () ##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 () ##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 () ##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. () ##Syn.: ''Cetraria fendleri'' (Nyl.) Tuck.; ''Tuckermannopsis fendleri'' (Nyl.) Hale ##Skorepa ''et al.'' (1977) – 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 () ##Lendemer & Knapp (2007) - (4. Sharptown) #Tuckermannopsis ciliaris (Ach.) Gyelnik () ##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. () ##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. () ##Skorepa ''et al.'' (1977) – Allegany Co., on rock outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. #Umbilicaria vellea (L.) Hoffm. () ##Skorepa ''et al.'' (1977) – No locality. (collected by Plitt 1912) ##Skorepa ''et al.'' (1979) – on acidic rock. #Usnea filipendula Stirton () ##Syn.: ''Usnea dasypoga'' (Ach.) Rohl. ##Skorepa ''et al.'' (1977) – Garrett Co., (collected by Smith). ##Skorepa ''et al.'' (1979) – on bark. #Usnea mutabilis Stirton () ##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 () ##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) #Usnea strigosa (Ach.) Eaton () ##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. () ##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 () ##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) #Usnea trichodea Ach. () ##Skorepa ''et al.'' (1977) – Worcester Co., on tops of Cypress trees. ##Skorepa ''et al.'' (1979) – on bark. ##Biechele (2002) – lower eastern shore of Maryland. ##Lendemer & Knapp (2007) - (6. Pocomoke) #Verrucaria calciseda DC. () ##Skorepa ''et al.'' (1979) – on calcareous rock. #Verrucaria fuscella (Turner) Winch () ##Skorepa ''et al.'' (1979) – on calcareous rock. #Verrucaria glaucovirens Grummann () ##Syn.: ''Verrucaria virens'' Nyl. ##Skorepa ''et al.'' (1979) – on calcareous rock. #Verrucaria muralis Ach. () ##Skorepa ''et al.'' (1979) – on calcareous rock. #Verrucaria nigrescens Pers. () ##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight. ##Skorepa ''et al.'' (1979) – on calcareous rock. #Verrucaria pinguicula A. Massal. () ##Skorepa ''et al.'' (1979) – on calcareous rock. #Xanthomendoza fallax (Hepp) Søchting, Kärnefelt & S. Kondr. () ##Syn.: ''Xanthoria fallax'' (Hepp) Arn. ##Skorepa ''et al.'' (1977) – Worcester Co., on deciduous trees. ##Skorepa ''et al.'' (1979) – on bark, cement. ##Biechele (2002) – lower eastern shore of Maryland. #Xanthomendoza fulva (Hoffm.) Søchting, Kärnefelt & S. Kondr. () ##Syn.: ''Xanthoria fulva'' (Hoffm.) Poelt & Petutschnig ##E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. #Xanthoparmelia angustiphylla (Gyelnik) Hale () ##Syn.: ''Parmelia hypopsila'' Müll. Arg. = ''Xanthoparmelia hypopsila'', but N.A. records are ''Xanthoparmelia angustiphylla''. ##Skorepa ''et al.'' (1977) – Baltimore Co., on rock outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. #Xanthoparmelia conspersa (Ehrh. ''ex'' Ach.) Hale () ##Syn.: ''Parmelia conspersa'' (Ach.) Ach. ##Skorepa ''et al.'' (1977) – Garrett Co., on rock outcrop. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Gunpowder River, on rock outcrops; Frederick Co. #Xanthoparmelia cumberlandia (Gyelnik) Hale () ##Syn.: ''Parmelia cumberlandia'' (Gyelnik) Hale ##Skorepa ''et al.'' (1977) – Baltimore Co., on rocks on hillside. ##Skorepa ''et al.'' (1979) – on acidic rock. #Xanthoparmelia plittii (Gyelnk) Hale () ##Syn.: ''Parmelia plittii'' Gyelnik ##Skorepa ''et al.'' (1977) – Washington Co., on rock outcrops. ##Skorepa ''et al.'' (1979) – on acidic rock. ##E.C. Uebel Herbarium – Lichens of Soldiers Delight. #Xanthoparmelia subramigera (Gyelnik) Hale () ##E.C. Uebel Herbarium – Prince George's Co., Berwyn Heights, on roof shingles (identified by Dr. Richard C. Harris). #Xanthoparmelia tasmanica (Hook. f. & Taylor) Hale () ##Syn.: ''Parmelia tasmanica'' Hook. f. & Taylor ##Skorepa ''et al.'' (1979) – on acidic rock. #Xanthoparmelia viriduloumbrina (Gyelnik) Lendemer () ##Syn: ''Parmelia taractica'' Kremplh. = ''Xanthoparmelia taractica'' (Kremp.) Hale – known from Mexico, but misidentifications for our area; specimens in eastern N.A. are ''X. viriduloumbrina''. ##Skorepa ''et al.'' (1977) (''Parmelia taractica'') – Baltimore Co., on serpentine rocks. ##Skorepa ''et al.'' (1979) (''Parmelia taractica'') – on acidic rock. ##E.G. Worthley Herbarium (''Parmelia taractica''); Allegany Co. (''Parmelia taractica''), Green Ridge State Forest, on red shale; Carroll Co. (''Parmelia taractica''), Church of the Brethren, on stone wall. #Xanthoria parietina? (L.) Th. Fr. () ##Biechele (2002) – lower eastern shore of Maryland. ==References== *Biechele, Lance T. 2002. ''The lichen flora of the lower Eastern Shore of the Delmarva Peninsula''. Evansia 19 (1): 17-19. *Lendemer, J. C., and W. M. Knapp. 2007. ''Contributions to the lichen flora of Maryland: recent collections from the Delmarva Peninsula''. Opuscula Philolichenum 4: 23-40. () *Skorepa, A. C., A. W. Norden and D. R. Windler. 1977. ''Studies on the lichens of Maryland''. (checklist ). Castanea 42 (4): 265-279. *Skorepa, A. C., A. W. Norden and D. R. Windler. 1979. ''Substrate ecology of lichens in Maryland''. Castanea 44 (3): 129-142. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of lichens of Maryland」の詳細全文を読む スポンサード リンク
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