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Lichens of Maryland : ウィキペディア英語版
List of lichens of Maryland
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.

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