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 [1], 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   [Acarosporaceae]
##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.   [Acarosporaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Ahtiana aurescens' (Tuck.) Thell & Randlane   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Physciaceae]
##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   [Physciaceae]
##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.   [Physciaceae]
##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   [Physciaceae]
##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   [Monoblastiaceae]
##Lendemer & Knapp (2007) - (4. Sharptown)
#'Anzia americana' Yoshim. & Sharp   [Parmeliaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Anzia colpodes' (Ach.) Stizenb.   [Parmeliaceae]
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Arctoparmelia centrifuga?' (L.) Hale   [Parmeliaceae]
##E.G. Worthley Herbarium - Baltimore Co., Owings Mills.
#'Arthonia caesia' (Flotow) Körber   [Arthoniaceae]
##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.   [Arthoniaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Arthopyrenia cinereopruinosa' (Schaerer) A. Massal.   [Arthopyreniaceae]
##Syn.: ''Arthopyrenia pinicola'' (Hepp) Mass.
##Skorepa ''et al.'' (1977) – Montgomery Co., trunk of elm.
##Skorepa ''et al.'' (1979) – on bark.
#'Arthothelium interveniens' (Nyl.) Zahlbr.   [Arthoniales]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Aspicilia caesiocinerea' (Nyl. ex Malbr.) Arnold   [Hymeneliaceae]
##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   [Hymeneliaceae]
##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'   [Bacidiaceae]
##Syn.: ''Bacidia atrogrisea'' (Delilse ''ex'' Hepp) Körber
##Skorepa ''et al.'' (1979) – on bark.
#'Bacidia polychroa' (Th. Fr.) Körber   [Bacidiaceae]
##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   [Bacidiaceae]
##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   [Bacidiaceae]
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Bacidina egenula' (Nyl.) Vězda   [Bacidiaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Bacidina inundata' (Fr.) Vezda   [Bacidiaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Baculifera curtisii' (Tuck.) Marbach   [Physciaceae]
##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   [Trypetheliaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Biatora vernalis' (L.) Fr.   [Bacidiaceae]
##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.   [Brigantiaeaceae]
##Biechele (2002) – lower eastern shore of Maryland.
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Bryoria furcellata' (Fr.) Brodo & D. Hawksw.   [Parmeliaceae]
##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.   [Physciaceae]
##Syn.: ''Buellia turgescens'' Tuck.
##E.G. Worthley Herbarium - Baltimore Co., St. Thomas Cemetery.
#'Buellia curtisii' (Tuck.) Imshaug &nbps; [Physciaceae]
##Lendemer & Knapp (2007) (1. Millington), (3. Chesapeake)
#'Buellia spuria' (Schaerer) Anzi   [Physciaceae]
##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.   [Physciaceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Plitt)
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Buellia stillingiana' J. Steiner   [Physciaceae]
##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.   [Physciaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Byssoloma leucoblepharum' Vainio   [Pilocarpaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Byssoloma meadii' (Tuck.) S. Ekman   [Pilocarpaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Calicium salicinum' Pers.   [Caliciaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Caloplaca camptidia' (Tuck.) Zahlbr.   [Teloschistaceae]
##Skorepa ''et al.'' (1977) – Montgomery Co., oak woods.
##Skorepa ''et al.'' (1979) – on bark.
#'Caloplaca cerina' (Ehrh. ''ex'' Hedwig) Th. Fr.   [Teloschistaceae]
##Skorepa ''et al.'' (1977) – Garrett Co., on aspen trunks.
##Skorepa ''et al.'' (1979) – on bark.
#'Caloplaca citrina' (Hoffm.) Th. Fr.   [Teloschistaceae]
##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.   [Teloschistaceae]
##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   [Teloschistaceae]
##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) – Washingtn Co., on limestone.
##Skorepa ''et al.'' (1979) – on calcareous rock, cement.
#'Caloplaca holocarpa' (Hoffm. ''ex'' Ach.) M. Wade   [Teloschistaceae]
##Skorepa ''et al.'' (1977) – Frederick Co., on timbers.
##Skorepa ''et al.'' (1979) – on bark, calcareous rock, wood.
#'Caloplaca lobulata' (Flörke) de Lesd.   [Teloschistaceae]
##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   [Teloschistaceae]
##Skorepa ''et al.'' (1979) – wood.
#'Caloplaca oxfordensis' Fink   [Teloschistaceae]
##Skorepa ''et al.'' (1977) – Washington Co., on limestone.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Caloplaca sideritis' (Tuck.) Zahlbr.   [Teloschistaceae]
##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.   [Teloschistaceae]
##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   [Candelariaceae]
##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   [Candelariaceae]
##Lendemer & Knapp (2007) - (3. Chesapeake)
#'Candelariella vitellina' (Hoffm.) Müll. Arg.   [Candelariaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Verrucariaceae]
##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.   [Catillariaceae]
##Skorepa ''et al.'' (1977) – Frederick Co., on rocks.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Cetraria arenaria' Kärnefelt   [Parmeliaceae]
##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.   [Parmeliaceae]
##E.G. Worthley Herbarium - Baltimore Co., Owings Mills, on oak.
#'Cetrelia chicitae' (W. Culb.) W. Culb. & C. Culb.   [Parmeliaceae]
##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.   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on trunk of deciduous tree.
##Skorepa ''et al.'' (1979) – on bark.
#'Chrismofulvea dialyta' (Nyl.) Marbach   [Physciaceae]
##Syn.: ''Buellia dialyta'' (Nyl.) Tuck.
##Skorepa ''et al.'' (1979) – on bark.
#'Chrysothrix candelaris' (L.) J. R. Laundon   [Chrysotrichaceae]
##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.''   [Chrysotrichaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Cladonia apodocarpa' Robbins   [Cladoniaceae]
##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   [Cladoniaceae]
##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   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Biechele (2002) – lower eastern shore of Maryland.
#'Cladonia beaumontii' (Taylor) Vainio   [Cladoniaceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Cladonia boryi' Tuck.   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##This is probably a misidentification of ''Cladonia caroliniana''.
#'Cladonia caespiticia' (Pers.) Flörke   [Cladoniaceae]
##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   [Cladoniaceae]
##E.G. Worthley Herbarium - Lichens of Soldiers Delight.
#'Cladonia caroliniana' Tuck.   [Cladoniaceae]
##E.C. Uebel Herbarium – Lichens of Soldiers Delight.
#'Cladonia cervicornis' subsp. 'verticillata' (Hoffm.) Ahti   [Cladoniaceae]
##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   [Cladoniaceae]
##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   [Cladoniaceae]
##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.   [Cladoniaceae]
##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'   [Cladoniaceae]
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Cladonia fimbriata' (L.) Fr.   [Cladoniaceae]
##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   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Harford Co., on rotting wood.
#'Cladonia furcata' (Hudson) Schrader   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Harford Co., on moss.
#'Cladonia gracilis' (L.) Willd. subsp. ''gracilis''   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##E.G. Worthley Herbarium - Lichens of Soldiers Delight.
#'Cladonia grayi' Merr. ''ex'' Sandst.   [Cladoniaceae]
##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   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Wicomico Co., on sandy soil.
##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke)
#'Cladonia macilenta' Hoffm.   [Cladoniaceae]
##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   [Cladoniaceae]
##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   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., on exposed rocks.
#'Cladonia ochrochlora' Flörke   [Cladoniaceae]
##Lendemer & Knapp (2007) - (1. Millington)
#'Cladonia parasitica' (Hoffm.) Hoffm.   [Cladoniaceae]
##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   [Cladoniaceae]
##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.   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Wicomico Co., on soil.
##E.G. Worthley Herbarium - Baltimore Co.; Wicomico Co.
#'Cladonia pleurota' (Flörke) Schaerer   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Biechele (2002) – lower eastern shore of Maryland.
#'Cladonia polycarpia' G. Merr.   [Cladoniaceae]
##Lendemer & Knapp (2007) - (3. Chesapeake)
#'Cladonia polycarpoides' Nyl.   [Cladoniaceae]
##Biechele (2002) – lower eastern shore of Maryland.
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Cladonia pyxidata' (L.) Hoffm.   [Cladoniaceae]
##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   [Cladoniaceae]
##E.G. Worthley Herbarium - Worcester Co., Milburn Landing.
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Cladonia rangiferina' (L.) F.H. Wigg.   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on soil.
##E.G. Worthley Herbarium - Calvert Co.; Wicomico Co.
#'Cladonia rappii' A. Evans   [Cladoniaceae]
##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.   [Cladoniaceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Cladonia rei' Schaerer   [Cladoniaceae]
##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.   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Dorchester Co., on soil.
##Biechele (2002) – lower eastern shore of Maryland.
#'Cladonia squamosa' Hoffm.   [Cladoniaceae]
##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   [Cladoniaceae]
##Syn.: ''Cladonia alpestris'' (L.) Rabenh.
##Skorepa ''et al.'' (1977) – Garrett Co., on soil.
#'Cladonia strepsilis' (Ach.) Grognot   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Prince George's Co., on shoulder of road.
##E.G. Worthley Herbarium - Prince George's Co.
#'Cladonia subcariosa' Nyl.   [Cladoniaceae]
##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   [Cladoniaceae]
##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.   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Wicomico Co., on soil.
#'Cladonia uncialis' (L.) F.H. Wigg.   [Cladoniaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Biechele (2002) – lower eastern shore of Maryland.
#'Coccocarpia palmicola' (Sprengel) Arv. & D.J. Galloway   [Coccocarpiaceae]
##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   [Gyalectaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Coenogonium pineti' (Ach.) Kalb & Lücking   [Gyalectaceae]
##Syn.: ''Dimerella diluta'' (Pers.) Trevisan
##Skorepa ''et al.'' (1979) – on wood, other.
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Collema coccophorum' Tuck.   [Collemataceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Collema conglomeratum' Hoffm.   [Collemataceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Collema furfuraceum' (Arnold) Du Rietz   [Collemataceae]
##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   [Collemataceae]
##Syn.: ''Collema tuniforme'' (Ach.) Ach.
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Collema leptaleum' Tuck.   [Collemataceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Collema subflaccidum' Degel.   [Collemataceae]
##Skorepa ''et al.'' (1979) – acidic rock.
##E.G. Worthley Herbarium - Baltimore Co., Gunpowder River, on bark of Tulip Tree.
#'Collema undulatum' Laurer ''ex'' Flotow   [Collemataceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Cyphelium tigillare' (Ach.) Ach.   [Caliciaceae]
##Skorepa ''et al.'' (1979) – on wood.
#'Dactylospora inquilina' Hafellner   [Dactylosporaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.) (on ''Pertusaria paratuberculifera'')
#'Dermatocarpon luridum' (With.) J.R. Laundon   [Verrucariaceae]
##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   [Verrucariaceae]
##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   [Icmadophilaceae]
##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   [Physciaceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on sandstone outcrop.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Diploschistes scruposus' (Schreber) Norman   [Thelotremataceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Dirinaria frostii' (Tuck.) Hale & Culb.   [Physciaceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on shale outcrops.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Endocarpon petrolepideum' (Nyl.) Nyl.   [Verrucariaceae]
##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   [Verrucariaceae]
##Skorepa ''et al.'' (1977) – Washington Co., on chert.
##Skorepa ''et al.'' (1979) – on calcareous rock, cement.
#'Ephebe lanata' (L.) Vainio   [Lichinaceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Fissurina insidiosa' Hook. & C. Knight   [Graphidaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Flavoparmelia baltimorensis' (Gyelnik & Fóriss) Hale   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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.   [Pannariaceae]
##Syn.: ''Parmeliella microphylla'' (Sw.) Müll. Arg.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Fuscopannaria leucosticta' (Tuck.) P.M. Jørg.   [Pannariaceae]
##Syn.: ''Pannaria leucosticta'' (Tuck.) Tuck. ''ex'' Nyl.
##Skorepa ''et al.'' (1979) – on bark.
#'Gassicurtia vernicoma' (Tuck.) Marbach   [Physciaceae]
##Syn.: ''Buellia vernicoma'' (Tuck.) Tuck.
##Skorepa ''et al.'' (1977) – (collected by Plitt)
##Skorepa ''et al.'' (1979) – on bark.
#'Graphis scripta' (L.) Ach.   [Graphidaceae]
##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   [Physciaceae]
##Syn.: ''Buellia disciformis'' (Fr.) Mudd
##Skorepa ''et al.'' (1977) – Anne Arundel Co.
##Skorepa ''et al.'' (1979) – on bark.
#'Hertelidea botryosa' (Fr.) Printzen & Kantvilas   [Stereocaulaceae]
##Syn.: Lecidea botryosa (Fr.) Th. Fr.
##Skorepa ''et al.'' (1979) – on wood.
#'Heterodermia albicans' (Pers.) Swinscow & Krog   [Physciaceae]
##Syn.: ''Heterodermia domingensis'' (Ach.) Trev.
##Skorepa ''et al.'' (1977) – Wicomico Co., on tree trunks.
##Skorepa ''et al.'' (1979) – on bark.
#'Heterodermia appalachensis' (Kurok.) Culb.   [Physciaceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., on trunk of oak.
#'Heterodermia granulifera' (Ach.) Culb.   [Physciaceae]
##Skorepa ''et al.'' (1977) – Montgomery Co., on trunk of Walnut tree.
##Skorepa ''et al.'' (1979) – on bark.
#'Heterodermia hypoleuca' (Muhl.) Trevisan   [Physciaceae]
##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   [Physciaceae]
##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   [Physciaceae]
##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   [Hymeneliaceae]
##Syn.: ''Ionaspis epulotica'' (Ach.) Blomb. & Forssell
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Hyperphyscia adglutinata' (Flörke) H. Mayrh.   [Physciaceae]
##Syn.: ''Physciopsis adglutinata'' (Flörke) M. Choisy
##Skorepa ''et al.'' (1979) – on bark.
#'Hyperphyscia syncolla' (Tuck. ''ex'' Nyl.) Kalb   [Physciaceae]
##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   [Lecideaceae]
##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   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Garrett Co., on conifer bark.
##Skorepa ''et al.'' (1979) – on bark.
#'Hypogymnia physodes' (L.) Nyl.   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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.)   [Thelenellaceae]
##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of Tulip Tree.
#'Lasallia papulosa' (Ach.) Llano   [Umbilicariaceae]
##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   [Umbilicariaceae]
##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   [Umbilicariaceae]
##E.G. Worthley Herbarium - Frederick Co., South Mt.; Montgomery Co., Sugarloaf Mt., on boulders.
#'Lecanora albella' (Pers.) Ach. var. 'albella'   [Lecanoraceae]
##E.G. Worthley Herbarium - Worcester Co., on bark of ''Pinus taeda''.
#'Lecanora cadubriae' (A. Massal.) Hedl.   [Lecanoraceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Lecanora caesiorubella' Ach. subsp. 'caesiorubella'   [Lecanoraceae]
##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   [Lecanoraceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on shale outcrop.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Lecanora chlarotera' Nyl.   [Lecanoraceae]
##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.   [Lecanoraceae]
##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke)
#'Lecanora dispersa' (Pers.) Sommerf.   [Lecanoraceae]
##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.   [Lecanoraceae]
##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.   [Lecanoraceae]
##Skorepa ''et al.'' (1977) – Frederick Co., on old timbers.
##Skorepa ''et al.'' (1979) – on wood.
#'Lecanora hybocarpa' (Tuck.) Brodo   [Lecanoraceae]
##Biechele (2002) – lower eastern shore of Maryland.
##Lendemer & Knapp (2007) - (1. Millington), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke)
#'Lecanora imshaugii' Brodo   [Lecanoraceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Lecanora minutella' Nyl.   [Lecanoraceae]
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Lecanora muralis' (Schreber) Rabenh.   [Lecanoraceae]
##Skorepa ''et al.'' (1977) – Montgomery Co., on rock ledges.
#'Lecanora muralis' var. 'versicolor' (Pers.) Tuck.   [Lecanoraceae]
##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.   [Lecanoraceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Lecanora pulicaris' (Pers.) Ach.   [Lecanoraceae]
##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   [Lecanoraceae]
##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. -   [Lecanoraceae]
##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown)
#'Lecanora thysanophora' R.C. Harris   [Lecanoraceae]
##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   [Lecanoraceae]
##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.   [Lecideaceae]
##Skorepa ''et al.'' (1977) – Washington Co., on rocks.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Lecidea plebeja' Nyl.   [Lecideaceae]
##Syn.: ''Lecidea myriocarpoides'' Nyl.
##Skorepa ''et al.'' (1979) – on wood.
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Lecidella stigmatea' (Ach.) Hertel & Leuckert   [Lecanoraceae]
##Syn.: Lecidea stigmatea'' Ach.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Lepraria caesiella' R.C. Harris   [Family Not Determined]
##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown)
#'Lepraria' aff. 'incana' (L.) Ach.   [Family Not Determined]
##Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild)
#'Lepraria lobificans' Nyl.   [Family 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   [Family Not Determined]
##Syn.: ''Leproloma membranaceum'' (Dickson) Vainio
##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls.
#'Lepraria neglecta' (Nyl.) Erichsen   [Family 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.   [Collemataceae]
##Skorepa ''et al.'' (1977) – Montgomery Co., Plummers Is. (collected by Fink).
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Leptogium cyanescens' (Rabenh.) Körber   [Collemataceae]
##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.   [Collemataceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on bark of deciduous trees.
##Skorepa ''et al.'' (1979) – on bark, acidic rock.
#'Leptogium phyllocarpum' (Pers.) Mont.   [Collemataceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Leptogium subtile' (Schrader) Torss.   [Collemataceae]
##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.   [Anamorphic ''Ascomycetes'']
##Lendemer & Knapp (2007) - (5. Hickory Pt.) (on ''Lecanora cinereofusca'')
#'Lichenodiplis lecanorae' (Vouaux) Dyko & D. Hawksw.   [Anamorphic ''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.   [Lobariaceae]
##Skorepa ''et al.'' (1979) – on bark.
##Biechele (2002) – lower eastern shore of Maryland.
##E.G. Worthley Herbarium - Frederick Co., Cunningham Falls.
#'Lobaria quercizans' Michaux   [Lobariaceae]
##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   [Loxosporaceae]
##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown)
#'Melanelia culbersonii' (Hale) Thell   [Parmeliaceae]
##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.''   [Parmeliaceae]
##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.''.   [Parmeliaceae]
##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   [Lichinaceae]
##Syn.''Pyrenopsis melambola'' (Tuck.) Tuck.
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Micarea erratica' (Körber) Hertel, Rambold & Pietschmann   [Micareaceae]
##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'')   [Family Not Determined]
##Lendemer & Knapp (2007) - (4. Sharptown)
#'Mycobilimbia berengeriana' (A. Massal.) Hafellner & V. Wirth   [Porpidiaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Thelotremataceae]
##Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.), (6. Pocomoke)
#'Nephroma helveticum' Ach. subsp. 'helveticum '   [Nephromataceae]
##Skorepa ''et al.'' (1977) – Montgomery Co., Plummers Is. (collected by Fink).
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Normandina pulchella' (Borrer) Nyl.   [Verrucariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Ochrolechia androgyna' (Hoffm.) Arnold   [Pertusariaceae]
##Skorepa ''et al.'' (1977) – Anne Arundel Co.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Ochrolechia cinera' Chev.   [Pertusariaceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Ochrolechia pseudopallescens' Brodo   [Pertusariaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Ochrolechia trochophora' var. 'trochophora' (Vainio) Oshio   [Pertusariaceae]
##Syn.: ''Ochrolechia rosella'' (Müll. Arg.) Vers.
##Biechele (2002) – lower eastern shore of Maryland.
#'Ochrolechia yasudae' Vainio   [Pertusariaceae]
##Skorepa ''et al.'' (1977) – Frederick Co. (collected by Plitt).
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Opegrapha varia' Pers.   [Roccellaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Opegrapha viridis' Pers.   [Roccellaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Opegrapha vulgata' Ach.   [Roccellaceae]
##Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake), (4. Sharptown)
#'Pannaria conoplea' (Ach.) Bory   [Pannariaceae]
##Syn.: ''Pannaria pityrea auct.
##Skorepa ''et al.'' (1979) – on bark.
#'Pannaria lurida' (Mont.) Nyl.   [Pannariaceae]
##Skorepa ''et al.'' (1979) – on bark.
##Biechele (2002) – lower eastern shore of Maryland.
#'Parmelia saxatilis' (L.) Ach.   [Parmeliaceae]
##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   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Garrett Co., on ''Acer''.
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Parmelia sulcata' Taylor   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Washington Co., on deciduous trees.
##Skorepa ''et al.'' (1979) – on bark, acidic rock.
##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Carroll Co., on bark of ''Fraxinus americana''.
##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple.
#'Parmelinopsis horrescens' (Taylor) Elix & Hale   [Parmeliaceae]
##Syn.: ''Parmelia horrescens'' Taylor
##Skorepa ''et al.'' (1977) – Calvert Co., on trunks of pines.
##Skorepa ''et al.'' (1979) – on bark.
##E.G. Worthley Herbarium - Worcester Co., Milburn Landing, on bark of ''Pinus taeda''.
##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke)
#'Parmelinopsis minarum' (Vainio) Elix & Hale   [Parmeliaceae]
##Syn.: ''Parmelia dissecta'' Nyl.
##Skorepa ''et al.'' (1977) – Frederick Co., on oak trunk.
##Skorepa ''et al.'' (1979) – on bark, acidic rock.
##E.G. Worthley Herbarium - Lichens of Soldiers Delight.
##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.)
#'Parmeliopsis ambigua' (Wulfen) Nyl.   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Garrett Co., on trunk of deciduous tree.
##Skorepa ''et al.'' (1979) – on bark.
##E.G. Worthley Herbarium - Worcester Co., Milburn Landing, on bark of ''Pinus taeda''.
#'Parmeliopsis hyperopta' (Ach.) Arnold   [Parmeliaceae]
##Syn.: ''Parmeliopsis diffusa'' (Weber) Riddle
##E.G. Worthley Herbarium - Baltimore Co., Owings Mills.
#'Parmeliopsis subambigua' Gyelnik   [Parmeliaceae]
##Syn.: ''Parmeliopsis halei'' (Tuck.) Hale
##Skorepa ''et al.'' (1977) – Worcester Co., on pine trunks.
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (4. Sharptown), (6. Pocomoke)
#'Parmotrema cetratum' (Ach.) Hale   [Parmeliaceae]
##Syns.: ''Parmelia cetrata'' Ach, ''Rimelia cetrata'' (Ach.) Hale & Fletcher
##Skorepa ''et al.'' (1977) – Worcester Co., on trunk of Sweet gum.
##Skorepa ''et al.'' (1979) – on bark.
#'Parmotrema chinense' (Osbeck) Hale & Ahti   [Parmeliaceae]
##Syn.: ''Parmotrema perlatum'' (Huds.) Choisy
##E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple, on oak limb.
#'Parmotrema crinitum' (Ach.) M. Choisy   [Parmeliaceae]
##Syn.: ''Parmelia crinita'' Ach.
##Skorepa ''et al.'' (1977) – Worcester Co., on trunk of pine.
##Skorepa ''et al.'' (1979) – on bark.
##E.G. Worthley Herbarium - Baltimore Co., Owings Mills, on trees.
#'Parmotrema dilatatum' (Vainio) Hale   [Parmeliaceae]
##Syn.: ''Parmelia dilatata'' Vainio
##Skorepa ''et al.'' (1977) – Dorchester Co., on trunks of deciduous trees.
##Skorepa ''et al.'' (1979) – on bark.
#'Parmotrema eurysacum' (Hue) Hale   [Parmeliaceae]
##Syn.: ''Parmelia eurysaca'' Hue
##Skorepa ''et al.'' (1977) – Baltimore Co. (collected by Plitt).
##Skorepa ''et al.'' (1979) – on bark.
#'Parmotrema gardneri' (Dodge) Serux.   [Parmeliaceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Parmotrema hypoleucinum' (B. Stein) Hale   [Parmeliaceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Parmotrema hypoleucinum' (J. Steiner) Hale   [Parmeliaceae]
##Lendemer & Knapp (2007) - (4. Sharptown), (6. Pocomoke)
#'Parmotrema hypotropum' (Nyl.) Hale   [Parmeliaceae]
##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   [Parmeliaceae]
##Syn.: ''Parmelia margaritata'' Hue
##Skorepa ''et al.'' (1979) – on bark.
#'Parmotrema perforatum' (Jacq.) A. Massal.   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##Syn.: ''Parmelia subcrinita'' Nyl.
##Skorepa ''et al.'' (1977) – Somerset Co., on deciduous trees.
##Skorepa ''et al.'' (1979) – on bark.
#'Parmotrema xanthinum' (Müll. Arg.) Hale   [Parmeliaceae]
##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.   [Peltigeraceae]
##Skorepa ''et al.'' (1977) – No County, (Thomson, 1940).
#'Peltigera canina' (L.) Willd.   [Peltigeraceae]
##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   [Peltigeraceae]
##Syn.: ''Peltigera spuria'' (Ach.) DC.
##Skorepa ''et al.'' (1977) – Washington Co., on rock in seepage area.
#'Peltigera elisabethae' Gyelnik   [Peltigeraceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., with moss on wet rocks.
#'Peltigera evansiana' Gyelnik   [Peltigeraceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Plitt).
#'Peltigera horizontalis' (Hudson) Baumg.   [Peltigeraceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Merrill 1906).
#'Peltigera neckeri' Müll. Arg.   [Peltigeraceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Peltigera polydactylon' (Necker) Hoffm.   [Peltigeraceae]
##Skorepa ''et al.'' (1977) – Garrett Co., on moss covered rocks.
#'Peltigera praetextata' (Flörke ''ex'' Sommerf.) Zopf   [Peltigeraceae]
##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.   [Peltigeraceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Peltula euploca' (Ach.) Poelt   [Peltulaceae]
##Skorepa ''et al.'' (1979) – on soil.
#'Pertusaria amara' (Ach.) Nyl.   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria epixantha' R.C. Harris   [Pertusariaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Pertusaria globularis' (Ach.) Tuck.   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on other.
#'Pertusaria hypothamnolica' Dibben   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria macounii' (Lamb) Dibben   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria multipunctoides' Dibben   [Pertusariaceae]
##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.   [Pertusariaceae]
##Biechele (2002) – lower eastern shore of Maryland.
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Pertusaria paratuberculifera' Dibben   [Pertusariaceae]
##''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   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Pertusaria propinqua' Müll. Arg.   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Pertusaria pustulata' (Ach.) Duby   [Pertusariaceae]
##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   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria subpertusa' Brodo   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke)
#'Pertusaria tetrathalamia' (Fée) Nyl.   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria texana' Müll. Arg.   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Pertusaria trachythallina' Erichsen   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria velata' (Turner) Nyl.   [Pertusariaceae]
##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   [Pertusariaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Pertusaria xanthodes' Müll. Arg.   [Pertusariaceae]
##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   [Mycocaliciaceae]
##E.G. Worthley Herbarium - Baltimore Co., on twigs of ''Rhus glabra''.
#'Phaeocalicium polyporaeum' (Nyl.) Tibell   [Mycocaliciaceae]
##E.C. Uebel Herbarium – a specimem of Violet Toothed Polypore [''Trichaptum 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.   [Graphidaceae]
##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown)
#'Phaeophyscia adiastola' (Essl.) Essl.   [Physciaceae]
##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   [Physciaceae]
##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.   [Physciaceae]
##Syns.: ''Physcia hirsuta'' Mereschk., ''Phaeophyscia cernohorskyi'' (Nádv.) Essl.
##Skorepa ''et al.'' (1979) – on cement.
#'Phaeophyscia hirtella' Essl.   [Physciaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Phaeophyscia hispidula' (Ach.) Essl.   [Physciaceae]
##Syn.: ''Phaeophyscia imbricata'' Vainio
##Skorepa ''et al.'' (1979) – on bark.
#'Phaeophyscia pusilloides' (Zahlbr.) Essl.   [Physciaceae]
##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.   [Physciaceae]
##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   [Phlyctidaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Physcia adscendens' (Fr.) H. Olivier   [Physciaceae]
##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'   [Physciaceae]
##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.   [Physciaceae]
##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.   [Physciaceae]
##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   [Physciaceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., (collected by Plitt 1909)
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Physcia pseudospeciosa' J.W. Thomson   [Physciaceae]
##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   [Physciaceae]
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Physcia stellaris' (L.) Nyl.   [Physciaceae]
##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.   [Physciaceae]
##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.   [Physciaceae]
##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   [Physciaceae]
##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   [Verrucariaceae]
##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   [Verrucariaceae]
##E.G. Worthley Herbarium - Lichens of Soldiers Delight.
#'Placynthiella uliginosa' (Schrader) Coppins & P. James   [Agyriaceae]
##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   [Placynthiaceae]
##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.   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Garrett Co., on sandstone boulder.
##Skorepa ''et al.'' (1979) – on bark, acidic rock, wood
#'Polysporina simplex' (Davies) Vezda   [Acarosporaceae]
##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.   [Trichotheliaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Porina heterospora' (Fink ''ex'' J. Hedrick) R.C. Harris [Trichotheliaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Porpidia albocaerulescens' (Wulfen) Hertel & Knoph   [Porpidiaceae]
##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   [Porpidiaceae]
##E.C. Uebel Herbarium – Lichens of Soldiers Delight.
#'Porpidia macrocarpa' (DC.) Hertel & A. J. Schwab   [Porpidiaceae]
##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   [Psoraceae]
##Skorepa ''et al.'' (1979) – on calcareous rock, cement.
#'Pseudevernia consocians' (Vainio) Hale & Culb.   [Parmeliaceae]
##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   [Porinaceae]
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Pseudosagedia raphidosperma' (Müll. Arg.) R.C. Harris   [Porinaceae]
##Lendemer & Knapp (2007) - (4. Sharptown)
#'Psora decipiens' (Hedwig) Hoffm.   [Psoraceae]
##Syn.: ''Lecidea decipiens'' (Hedwig) Ach.
##Skorepa ''et al.'' (1979) – on soil.
#'Psora russellii' (Tuck.) A. Schneider   [Psoraceae]
##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   [Lichinaceae]
##Skorepa ''et al.'' (1979) – on cement.
#'Psorula rufonigra' (Tuck.) Gotth. Schneider   [Psoraceae]
##Syn.: ''Lecidea rufonigra'' (Tuck.) Nyl.
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Punctelia appalachensis' (Culb.) Krog   [Parmeliaceae]
##Syn.: ''Parmelia appalachensis'' Culb.
##Skorepa ''et al.'' (1979) – on bark.
#'Punctelia bolliana' (Müll. Arg.) Krog   [Parmeliaceae]
##Syn.: ''Parmelia bolliana'' Müll. Arg.
##Skorepa ''et al.'' (1979) – on bark.
#'Punctelia borreri' (Sm.) Krog   [Parmeliaceae]
##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   [Parmeliacae]
##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   [Parmeliaceae]
##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   [Cladoniaceae]
##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   [Pyrenulaceae]
##Syn.: ''Pyrenula neglecta'' R.C. Harris
##Skorepa ''et al.'' (1979) – on bark.
##Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.)
#'Pyrenula punctella' Trevis.   [Pyrenulaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Pyrenula subelliptica' (Tuck.) R.C. Harris   [Pyrenulaceae]
##Syn.: ''Pyrenula imperfecta'' (Ellis & Everh.) R.C. Harris
##Skorepa ''et al.'' (1979) – on bark.
#'Pyrrhospora varians' (Ach.) R.C. Harris   [Lecanoraceae]
##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   [Physciaceae]
##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.   [Physciaceae]
##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   [Physciaceae]
##E.C. Uebel Herbarium – Prince George's Co., on oak bark; Baltimore Co., on maple bark.
#'Ramalina americana?' Hale   [Ramalinaceae]
##Biechele (2002) – lower eastern shore of Maryland.
#'Ramalina fastigiata' (Pers.) Ach.   [Ramalinaceae]
##Skorepa ''et al.'' (1977) – Worcester Co., on branches of deciduous trees.
##Skorepa ''et al.'' (1979) – on bark.
#'Ramalina willeyi' R. Howe   [Ramalinaceae]
##Skorepa ''et al.'' (1977) – Worcester Co., on branches of deciduous trees.
##Biechele (2002) – lower eastern shore of Maryland.
#'Ramonia microspora' Vězda   [Gyalectaceae]
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Rhizocarpon concentricum' (Davies) Beltr.   [Rhizocarpaceae]
##E.G. Worthley Herbarium - Garrett Co., Swallow Falls State Forest, on sandstone.
#'Rhizocarpon eupetraeum' (Nyl.) Arnold   [Rhizocarpaceae]
##Syn.: ''Rhizocarpon intermedium'' Degel.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Rhizocarpon geographicum' (L.) DC.   [Rhizocarpaceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Rhizocarpon obscuratum' (Ach.) A. Massal.   [Rhizocarpaceae]
##Skorepa ''et al.'' (1977) – Baltimore Co., on rock outcrop.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Rhizoplaca chrysoleuca' (Sm.) Zopf   [Lecanoraceae]
##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   [Parmeliaceae]
##Syn.: ''Parmelia subisidiosa'' (Müll. Arg.) C.W. Dodge
##Skorepa ''et al.'' (1979) – on bark.
#'Rinodina applanata' H. Magn.   [Physciaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Rinodina ascociscana' Tuck.   [Physciaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Rinodina exigua' (Ach.) Gray   [Physciaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Rinodina ochrocea' Willey ''ex'' Fink   [Physciaceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Rinodina oxydata' (A. Massal.) A. Massal.   [Physciaceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Rinodina papillata' H. Magn.   [Physciaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Rinodina subminuta'H. Magn.   [Physciaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Sarcogyne clavus' (DC.) Kremp.   [Acarosporaceae]
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Sarcogyne regularis' Körber   [Acarosporaceae]
##Skorepa ''et al.'' (1979) – on calcareous rock.
##E.C. Uebel Herbarium – Prince George's Co., Greenbelt, on hill of concrete.
#'Sarcosagium campestre' (Fr.) Poetsch & Schiedem.   [Acarosporaceae]
##Syn.: ''Biatorella campestris'' (Fr.) Almq.
##Skorepa ''et al.'' (1979) – on soil.
#'Schismatomma glaucescens' (Nyl. ''ex'' Willey) R.C. Harris   [Roccellaceae]
##Lendemer & Knapp (2007) - (4. Sharptown)
#'Scoliciosporum chlorococcum' (Stenh.) Vezda   [Lecanoraceae]
##Syn.: ''Bacidia chlorococca'' (Graeve ''ex'' Stizenb.) Lett.
##Skorepa ''et al.'' (1977) – Montgomery Co., on oak.
##Skorepa ''et al.'' (1979) – on bark.
##E.G. Worthley Herbarium - Worcester Co., Milburn Landing.
##E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of ''Acer rubrum''.
##Lendemer & Knapp (2007) - (2. Idylwild)
#'Scoliciosporum umbrinum' (Ach.) Arnold   [Lecanoraceae]
##Syn.: ''Bacidia umbrina'' (Ach.) Bausch
##Skorepa ''et al.'' (1977) – Garrett Co., on aspens.
##Skorepa ''et al.'' (1979) – on acid rock.
#'Sphinctrina turbinata' (Pers ''ex'' Fr.) de Not.   [Sphinctrinaceae]
##E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on ''Aspicilia caesiocinerea''.
#'Sticta fuliginosa' (Hoffm.) Ach.   [Lobariaceae]
##E.G. Worthley Herbarium - Frederick Co., along Appalachian Trail, on soil.
#'Teloschistes chrysophthalmus' (L.) Th. Fr.   [Teloschistaceae]
##Skorepa ''et al.'' (1979) – on bark.
#'Tephromela atra' (Huds.) Hafellner   [Bacidiaceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Thelidium minutulum' Körber   [Verrucariaceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.)
#'Thelotrema monospermum' R.C. Harris   [Thelotremataceae]
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Thelotrema subtile' Tuck.   [Thelotremataceae]
##Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke)
#'Trapelia coarctata' (Sm.) M. Choisy   [Agyriaceae]
##Syn.: ''Lecidea coarctata (Sm.) Nyl.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Trapeliopsis flexuosa' (Fr.) Coppins & P. James   [Agyriaceae]
##Syn.: ''Lecidea aeruginosa'' Borrer
##Skorepa ''et al.'' (1977) – Harford Co., on fence post.
##Skorepa ''et al.'' (1979) – on wood.
##E.C. Uebel Herbarium – Prince George's Co., NE Branch of Anacostia River Bike Trail, on weathered fence rail.
##Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake)
#'Trapeliopsis granulosa' (Hoffm.) Lumbsch   [Agyriaceae]
##Syn.: ''Lecidea granulosa'' (Hoffm.) Ach.
##Skorepa ''et al.'' (1979) – on soil.
##E.G. Worthley Herbarium - Montgomery Co., Great Falls, on timber.
#'Trypethelium virens' Tuck. ''ex'' Michener   [Trypetheliaceae]
##Skorepa ''et al.'' (1979) – on bark.
##E.G. Worthley Herbarium - Calvert Co., on bark.
##Lendemer & Knapp (2007) - (4. Sharptown), (5. Hickory Pt.)
#'Tuckermanella fendleri' (Nyl.) Essl.   [Parmeliaceae]
##Syn.: ''Cetraria fendleri'' (Nyl.) Tuck.; ''Tuckermannopsis fendleri'' (Nyl.) Hale
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Skorepa ''et al.'' (1979) – on bark.
##Biechele (2002) – lower eastern shore of Maryland.
##E.G. Worthley Herbarium - Wicomico Co., Wicomico State Park; on Loblolly Pine; Worcester Co., Milburn Landing, on bark of Loblolly Pines.
#'Tuckermannopsis americana' (Sprengel) Hale   [Parmeliaceae]
##Lendemer & Knapp (2007) - (4. Sharptown)
#'Tuckermannopsis ciliaris' (Ach.) Gyelnik   [Parmeliaceae]
##Syn.: ''Cetraria ciliaris'' Ach.
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Skorepa ''et al.'' (1979) – on bark.
##E.G. Worthley Herbarium - Lichens of Soldiers Delight; Wicomico Co., on bark.
#'Umbilicaria mammulata' (Ach.) Tuck.   [Umbilicariaceae]
##Syn.: ''Gyrophora dillenii'' (Tuck.) Müll.
##Skorepa ''et al.'' (1977) – Garrett Co., on conglomerate.
##Skorepa ''et al.'' (1979) – on bark, acidic rock.
##E.G. Worthley Herbarium - Baltimore Co., Loch Raven, on rock outcrop; Frederick Co., South Mt., on boulders; Montgomery Co., Sugarloaf Mt., on boulders.
#'Umbilicaria muehlenbergii' (Ach.) Tuck.   [Umbilicariaceae]
##Skorepa ''et al.'' (1977) – Allegany Co., on rock outcrop.
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Umbilicaria vellea' (L.) Hoffm.   [Umbilicariaceae]
##Skorepa ''et al.'' (1977) – No locality. (collected by Plitt 1912)
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Usnea filipendula' Stirton   [Parmeliaceae]
##Syn.: ''Usnea dasypoga'' (Ach.) Rohl.
##Skorepa ''et al.'' (1977) – Garrett Co., (collected by Smith).
##Skorepa ''et al.'' (1979) – on bark.
#'Usnea mutabilis' Stirton   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Worcester Co., on pines.
##Skorepa ''et al.'' (1979) – on bark.
##Biechele (2002) – lower eastern shore of Maryland.
##E.G. Worthley Herbarium - Worcester Co., Pocomoke State Park, on ''Taxodium distichum''.
#'Usnea pensylvanica' Motyka   [Parmeliaceae]
##Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke)
#'Usnea strigosa' (Ach.) Eaton   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Worcester Co., on deciduous trees.
##Biechele (2002) – lower eastern shore of Maryland.
##E.G. Worthley Herbarium – Worcester Co.; Calvert Co, Battle Creek Cypress Swamp; St. Mary's Co.; Wicomico Co.
##E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple.
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Usnea strigosa' subsp. 'rubiginea' (Michaux) I. Tav.   [Parmeliaceae]
##Syn.: ''Usnea rubiginea'' (Michx.) Massal.
##Skorepa ''et al.'' (1977) – Worcester Co., on deciduous trees.
##Skorepa ''et al.'' (1979) – on bark.
#''Usnea subscabrosa'' Nyl. ''ex'' Motyka   [Parmeliaceae]
##Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke)
#'Usnea trichodea' Ach.   [Parmeliaceae]
##Skorepa ''et al.'' (1977) – Worcester Co., on tops of Cypress trees.
##Skorepa ''et al.'' (1979) – on bark.
##Biechele (2002) – lower eastern shore of Maryland.
##Lendemer & Knapp (2007) - (6. Pocomoke)
#'Verrucaria calciseda' DC.   [Verrucariaceae]
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Verrucaria fuscella' (Turner) Winch   [Verrucariaceae]
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Verrucaria glaucovirens' Grummann   [Verrucariaceae]
##Syn.: ''Verrucaria virens'' Nyl.
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Verrucaria muralis' Ach.   [Verrucariaceae]
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Verrucaria nigrescens' Pers.   [Verrucariaceae]
##Skorepa ''et al.'' (1977) – Lichens of Soldiers Delight.
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Verrucaria pinguicula' A. Massal.   [Verrucariaceae]
##Skorepa ''et al.'' (1979) – on calcareous rock.
#'Xanthomendoza fallax' (Hepp) Søchting, Kärnefelt & S. Kondr.   [Teloschistaceae]
##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.   [Teloschistaceae]
##Syn.: ''Xanthoria fulva'' (Hoffm.) Poelt & Petutschnig
##E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple.
#'Xanthoparmelia angustiphylla' (Gyelnik) Hale   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##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   [Parmeliaceae]
##Syn.: ''Parmelia tasmanica'' Hook. f. & Taylor
##Skorepa ''et al.'' (1979) – on acidic rock.
#'Xanthoparmelia viriduloumbrina' (Gyelnik) Lendemer   [Parmeliaceae]
##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 candelaria' (L.) Th. Fr.   [Teloschistaceae]
##Skorepa ''et al.'' (1977) – Wicomico Co., on trees.
##Skorepa ''et al.'' (1979) – on bark, cement.
##E.G. Worthley Herbarium – (no county), on bark of ''Robinia pseudoacacia''; Baltimore Co., Greenspring Valley Rd., on bark at base of ''Acer rubrum''; Baltimore Co., Reisterstown, on cement interstices of brick wall.
#'Xanthoria parietina?' (L.) Th. Fr.   [Teloschistaceae]
##Biechele (2002) – lower eastern shore of Maryland.

Contents

References

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. [2]

★ Skorepa, A. C., A. W. Norden and D. R. Windler. 1977. ''Studies on the lichens of Maryland''. [Annotated 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.