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 [http://www.pwrc.usgs.gov/resshow/perry/bios/NordenArnold.htm] , 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) – Washington 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 subminutaH. 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 parietina? (L.) Th. Fr. [Teloschistaceae]
##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. [http://clade.acnatsci.org/lendemer/OP4p4.pdf]

*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.