The following list of lichens of Maryland is derived from the following sources: (1) lichens listed in the 1977 publication by Skorepa (Allen C. Skorepa), Norden , and Windler. (2) lichens listed in the 1979 publication by Skorepa, Norden, and Windler. (3) lichens listed in the 2002 publication by Biechele as occurring on Maryland's Delmarva Peninsula. (4) lichens in Elmer Worthley's personal herbarium. (5) lichens found in Maryland by Edward Uebel. (6) lichens reported on Maryland's Delmarva Peninsula by Lendemer and Knapp (2007) at six locations: 1. Millington State Wildlife Management Area (1. Millington); 2. Idylwild State Wildlife Management Area (2. Idylwild); 3. Chesapeake State Forest (3. Chesapeake); 4. Sharptown Dunes (4. Sharptown); 5. Hickory Point Cypress Swamp (5. Hickory Pt.); 6. Pocomoke State Forest (6. Pocomoke).
List 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 [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.