| has abstract
| - 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). 1.
* Acarospora fuscata (Schrader) Arnold [Acarosporaceae] 2. 1.
* Skorepa et al. (1979) – on acidic rock. 3. 2.
* E.G. Worthley Herbarium - Carroll Co., on stone wall. 4. 3.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 5.
* Acarospora schleicheri (Ach.) A. Massal. [Acarosporaceae] 6. 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Skorepa et al. (1979) – on acidic rock. 7.
* Ahtiana aurescens (Tuck.) Thell & Randlane [Parmeliaceae] 8. 1.
* Syn.: Cetraria aurescens Tuck. 9. 2.
* Skorepa et al. (1977) – Allegany Co., on branches of pines. 10. 3.
* Skorepa et al. (1979) – on bark. 11.
* Allocetraria oakesiana (Tuck.) Randlane & Thell [Parmeliaceae] 12. 1.
* Syn.: Cetraria oakesiana Tuck. 13. 2.
* Skorepa et al. (1977) – Frederick Co., base of oak. 14. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 15. 4.
* E.G. Worthley Herbarium - Garrett Co., along Big Run, on stumps. 16.
* Amandinea milliaria (Tuck.) P. May & Sheard [Physciaceae] 17. 1.
* Syn.: Rinodina milliaria Tuck. 18. 2.
* Skorepa et al. (1977) – Calvert Co., on trunks of deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 19. 4.
* Biechele (2002) – lower eastern shore of Maryland. 20.
* Amandinea polyspora (Willey) E. Lay & P. May [Physciaceae] 21. 1.
* Syn.: Buellia polyspora (Willey) Vainio 22. 2.
* Skorepa et al. (1977) – Carroll Co., bark of deciduous tree. 3.
* Skorepa et al. (1979) – on bark. 23. 4.
* E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. 24.
* Amandinea punctata (Hoffm.) Coppins & Scheid. [Physciaceae] 25. 1.
* Syn.: Buellia punctata (Hoffm.) Massal. 26. 2.
* Skorepa et al. (1977) – Worcester Co., on oak twigs. 3.
* Skorepa et al. (1979) – on bark. 27. 4.
* Lendemer & Knapp (2007) - (2. Idylwild) 28.
* Anaptychia palmulata (Michaux) Vainio [Physciaceae] 29. 1.
* Skorepa et al. (1977) – Calvert Co., trunks of deciduous trees. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 30. 4.
* E.G. Worthley Herbarium - Baltimore Co.; Calvert Co.; Frederick Co. 31.
* Anisomeridium polypori (Ellis & Everh.) M.E. Barr [Monoblastiaceae] 32. 1.
* Lendemer & Knapp (2007) - (4. Sharptown) 33.
* Anzia americana Yoshim. & Sharp [Parmeliaceae] 34. 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 35.
* Anzia colpodes (Ach.) Stizenb. [Parmeliaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Lendemer & Knapp (2007) - (6. Pocomoke) 36.
* Arctoparmelia centrifuga? (L.) Hale [Parmeliaceae] 37. 1.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills. 38.
* Arthonia caesia (Flotow) Körber [Arthoniaceae] 39. 1.
* Skorepa et al. (1977) – Baltimore Co., trunk of oak. 2.
* Skorepa et al. (1979) – on bark. 40. 3.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark; Ridge Road, on bark. 41. 4.
* Lendemer & Knapp (2007) (1. Millington) 42.
* Arthonia rubella (Fée) Nyl. [Arthoniaceae] 43. 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 44.
* Arthopyrenia cinereopruinosa (Schaerer) A. Massal. [Arthopyreniaceae] 45. 1.
* Syn.: Arthopyrenia pinicola (Hepp) Mass. 46. 2.
* Skorepa et al. (1977) – Montgomery Co., trunk of elm. 3.
* Skorepa et al. (1979) – on bark. 47.
* Arthothelium interveniens (Nyl.) Zahlbr. [Arthoniales] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 48.
* Aspicilia caesiocinerea (Nyl. ex Malbr.) Arnold [Hymeneliaceae] 49. 1.
* Syn.: Lecanora caesiocinerea Nyl. 50. 2.
* Skorepa et al. (1977) – Allegany Co., on shale outcrop. 3.
* Skorepa et al. (1979) – on acidic rock. 51. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Montgomery Co., Great Falls. 52. 5.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on acidic rock. 53.
* Aspicilia cinerea (L.) Körber [Hymeneliaceae] 54. 1.
* Syn.: Lecanora cinerea (L.) Somm. 55. 2.
* Skorepa et al. (1977) – Baltimore Co., on rock ledges. 3.
* Skorepa et al. (1979) – on acidic rock. 56. 4.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. 57.
* Bacidia laurocerasi (Delise ex Duby) Zahlbr. subsp. laurocerasi [Bacidiaceae] 58. 1.
* Syn.: Bacidia atrogrisea (Delilse ex Hepp) Körber 2.
* Skorepa et al. (1979) – on bark. 59.
* Bacidia polychroa (Th. Fr.) Körber [Bacidiaceae] 60. 1.
* Syn.: Bacidia fuscorubella (Hoffm.) Bausch. 61. 2.
* Skorepa et al. (1977) – Baltimore Co., on trunks of deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 62.
* Bacidia schweinitzii (Fr. ex E. Michener) A. Schneider [Bacidiaceae] 63. 1.
* Skorepa et al.. (1977) – Montgomery Co., on oak. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 64. 4.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight; Anne Arundel Co., Baltimore Co., Wicomico Co. 65. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) 66.
* Bacidia trachona (Ach.) Lettau [Bacidiaceae] 67. 1.
* Skorepa et al. (1979) – on calcareous rock. 68.
* Bacidina egenula (Nyl.) Vězda [Bacidiaceae] 69. 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 70.
* Bacidina inundata (Fr.) Vezda [Bacidiaceae] 1.
* Skorepa et al. (1979) – on bark. 71.
* Baculifera curtisii (Tuck.) Marbach [Physciaceae] 72. 1.
* Syn.: Buellia curtisii (Tuck.) Imsh. 73. 2.
* Skorepa et al.. (1977) – Calvert Co., trunk of deciduous tree. 3.
* Skorepa et al. (1979) – on bark. 74.
* Bathelium carolinianum (Tuck.) R.C. Harris [Trypetheliaceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 75.
* Biatora vernalis (L.) Fr. [Bacidiaceae] 76. 1.
* Syn.: Lecidea vernalis (L.) Ach. 77. 2.
* Skorepa et al. (1977) – Frederick Co., on trunks of oaks. 3.
* Skorepa et al. (1979) – on bark. 78.
* Brigantiaea leucoxantha (Spreng.) R. Sant. & Haffel. [Brigantiaeaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 2.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 79.
* Bryoria furcellata (Fr.) Brodo & D. Hawksw. [Parmeliaceae] 80. 1.
* Syn.: Alectoria nidulifera Norrl. 81. 2.
* Skorepa et al. (1977) – Garrett Co., on pine trunks. 82. 3.
* Skorepa et al. (1979) – on bark, acid rock. 83. 4.
* E.G. Worthley Herbarium - Wicomico Co. 84.
* Buellia badia (Fr.) Massal. [Physciaceae] 85. 1.
* Syn.: Buellia turgescens Tuck. 86. 2.
* E.G. Worthley Herbarium - Baltimore Co., St. Thomas Cemetery. 87.
* Buellia curtisii (Tuck.) Imshaug [Physciaceae] 88. 1.
* Lendemer & Knapp (2007) (1. Millington), (3. Chesapeake) 89.
* Buellia spuria (Schaerer) Anzi [Physciaceae] 90. 1.
* Skorepa et al. (1977) – Montgomery Co. (collection by Fink) 2.
* Skorepa et al. (1979) – on acidic rock. 91. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight. 92.
* Buellia stigmaea Tuck. [Physciaceae] 93. 1.
* Skorepa et al. (1977) – Baltimore Co., (collected by Plitt) 2.
* Skorepa et al. (1979) – on acidic rock. 94.
* Buellia stillingiana J. Steiner [Physciaceae] 1.
* Skorepa et al. (1977) – Calvert Co., on trunks of deciduous trees. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 95. 4.
* E.G. Worthley Herbarium - Worcester Co. 5.
* Lendemer & Knapp (2007) - (4. Sharptown) 96.
* Buellia vernicoma Tuck. [Physciaceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 97.
* Byssoloma leucoblepharum Vainio [Pilocarpaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 98.
* Byssoloma meadii (Tuck.) S. Ekman [Pilocarpaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 99.
* Calicium salicinum Pers. [Caliciaceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 100.
* Caloplaca camptidia (Tuck.) Zahlbr. [Teloschistaceae] 101. 1.
* Skorepa et al. (1977) – Montgomery Co., oak woods. 2.
* Skorepa et al. (1979) – on bark. 102.
* Caloplaca cerina (Ehrh. ex Hedwig) Th. Fr. [Teloschistaceae] 103. 1.
* Skorepa et al. (1977) – Garrett Co., on aspen trunks. 2.
* Skorepa et al. (1979) – on bark. 104.
* Caloplaca citrina (Hoffm.) Th. Fr. [Teloschistaceae] 105. 1.
* Skorepa et al. (1977) – Baltimore Co., on concrete bridge. 106. 2.
* Skorepa et al. (1979) – on cement. 3.
* Biechele (2002) – lower eastern shore of Maryland. 107. 4.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight; Baltimore Co., on wall of stone and cement. 108.
* Caloplaca feracissima H. Magn. [Teloschistaceae] 109. 1.
* Skorepa et al. (1977) – Frederick Co., on concrete. 2.
* Skorepa et al. (1979) – on cement. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight. 110. 4.
* E.C. Uebel Herbarium – Prince George's Co., on hill of concrete. 111.
* Caloplaca flavorubescens (Hudson) J. R. Laundon [Teloschistaceae] 112. 1.
* Syn.: Caloplaca aurantiaca (Lightf.) Th. Fr. 113. 2.
* Skorepa et al. (1977) – Allegany Co., on cement. 3.
* Skorepa et al. (1979) – on cement. 4.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills. 114.
* Caloplaca flavovirescens (Wulfen) Dalla Torre & Sarnth. 115. 1.
* Skorepa et al. (1977) – Washington Co., on limestone. 116. 2.
* Skorepa et al. (1979) – on calcareous rock, cement. 117.
* Caloplaca holocarpa (Hoffm. ex Ach.) M. Wade [Teloschistaceae] 118. 1.
* Skorepa et al. (1977) – Frederick Co., on timbers. 119. 2.
* Skorepa et al. (1979) – on bark, calcareous rock, wood. 120.
* Caloplaca lobulata (Flörke) de Lesd. [Teloschistaceae] 121. 1.
* Skorepa et al. (1977) – Cecil Co., on serpentine rock. 122. 2.
* Skorepa et al. (1979) – acidic rock. 123. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight; Baltimore Co., on bricks. 124.
* Caloplaca microphyllina (Tuck.) Hasse [Teloschistaceae] 125. 1.
* Skorepa et al. (1979) – wood. 126.
* Caloplaca oxfordensis Fink [Teloschistaceae] 1.
* Skorepa et al. (1977) – Washington Co., on limestone. 2.
* Skorepa et al. (1979) – on acidic rock. 127.
* Caloplaca sideritis (Tuck.) Zahlbr. [Teloschistaceae] 128. 1.
* Skorepa et al. (1977) – Frederick Co., on cement foundation. 2.
* Skorepa et al. (1979) – on acidic rock. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight. 129.
* Caloplaca subsoluta (Nyl.) Zahlbr. [Teloschistaceae] 130. 1.
* Syn.: Caloplaca modesta (Zahlbr.) Fink 131. 2.
* Skorepa et al. (1977) – Montgomery Co. (collected by Fink) 3.
* Skorepa et al. (1979) – on acidic rock. 132.
* Candelaria concolor (Dickson) B. Stein [Candelariaceae] 133. 1.
* Skorepa et al. (1977) – Allegany Co., on tree trunk. 2.
* Skorepa et al. (1979) – on bark. 134. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight; Frederick Co.; Carroll Co. 135. 4.
* E.C. Uebel Herbarium – Baltimore Co.; Prince George's Co., on bark. 5.
* Lendemer & Knapp (2007) - (2. Idylwild) 136.
* Candelariella reflexa (Nyl.) Lettau [Candelariaceae] 137. 1.
* Lendemer & Knapp (2007) - (3. Chesapeake) 138.
* Candelariella vitellina (Hoffm.) Müll. Arg. [Candelariaceae] 139. 1.
* Skorepa et al. (1977) – Baltimore Co., on rock face. 2.
* Skorepa et al. (1979) – on acidic rock. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight. 140.
* Canoparmelia caroliniana (Nyl.) Elix & Hale [Parmeliaceae] 141. 1.
* Syn.: Parmelia caroliniana Nyl. 142. 2.
* Skorepa et al. (1977) – Worcester Co., on tree trunks. 3.
* Biechele (2002) – lower eastern shore of Maryland. 143. 4.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) 144.
* Canoparmelia crozalsiana (de Lesd. ex Harm.) Elix & Hale [Parmeliaceae] 145. 1.
* Syn.: Parmelia crozalsiana B. de Lesd. ex Harm. 146. 2.
* Skorepa et al. (1977) – Frederick Co., on trunk of oak. 3.
* Skorepa et al. (1979) – on bark. 147. 4.
* E.G. Worthley Herbarium - Talbot Co., on Sycamore. 5.
* Lendemer & Knapp (2007) - (2. Idylwild) 148.
* Canoparmelia texana (Tuck.) Elix & Hale [Parmeliaceae] 149. 1.
* Syn.: Parmelia texana Tuck. 150. 2.
* Skorepa et al. (1977) – Frederick Co., on trunk of maple. 3.
* Skorepa et al. (1979) – on bark. 4.
* Lendemer & Knapp (2007) - (2. Idylwild) 151.
* Catapyrenium cinereum (Pers.) Körber [Verrucariaceae] 152. 1.
* Syn.: Dermatocarpon hepaticum (Ach.) Th. Fr. 153. 2.
* Skorepa et al. (1979) – on soil. 3.
* E.G. Worthley Herbarium – Lichens of Soldiers Delight. 154.
* Catillaria chalybeia (Borrer) A. Massal. [Catillariaceae] 155. 1.
* Skorepa et al. (1977) – Frederick Co., on rocks. 2.
* Skorepa et al. (1979) – on acidic rock. 156.
* Cetraria arenaria Kärnefelt [Parmeliaceae] 157. 1.
* Syn.: Cetraria islandica (L.) Ach. 158. 2.
* Skorepa et al. (1977) – Garrett Co., on soil. 3.
* Skorepa et al. (1979) – on soil. 159. 4.
* E.G. Worthley Herbarium - Garrett Co., Carey Run. 160.
* Cetrelia cetrarioides (Duby) Culb. & C. Culb. [Parmeliaceae] 161. 1.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills, on oak. 162.
* Cetrelia chicitae (W. Culb.) W. Culb. & C. Culb. [Parmeliaceae] 163. 1.
* Skorepa et al. (1977) – Garrett Co., on conglomerate. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 164. 3.
* E.G. Worthley Herbarium - Frederick Co., Mt. Catoctin Park. 165.
* Cetrelia olivetorum (Nyl.) Culb. & C. Culb. [Parmeliaceae] 166. 1.
* Skorepa et al. (1977) – Allegany Co., on trunk of deciduous tree. 2.
* Skorepa et al. (1979) – on bark. 167.
* Chrismofulvea dialyta (Nyl.) Marbach [Physciaceae] 168. 1.
* Syn.: Buellia dialyta (Nyl.) Tuck. 2.
* Skorepa et al. (1979) – on bark. 169.
* Chrysothrix candelaris (L.) J. R. Laundon [Chrysotrichaceae] 170. 1.
* Syn.: Lepraria candelaris (L.) Fr. 2.
* Skorepa et al. (1979) – on bark. 171. 3.
* E.G. Worthley Herbarium - Montgomery Co., on rock outcrop. 172. 4.
* E.C. Uebel Herbarium – Baltimore Co., Hollofield, on rock cliff. 5.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 173.
* Chrysothrix flavovirens Tønsberg s. lat. [Chrysotrichaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 174.
* Cladonia apodocarpa Robbins [Cladoniaceae] 175. 1.
* Skorepa et al. (1977) – Frederick Co., on soil. 176. 2.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Gunpowder Falls; Allegany Co. 177.
* Cladonia arbuscula (Wallr.) Flotow [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 178. 2.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Allegany Co., Green Ridge State Forest; Wicomico Co. 3.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 179.
* Cladonia atlantica A. Evans [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Biechele (2002) – lower eastern shore of Maryland. 180.
* Cladonia beaumontii (Taylor) Vainio [Cladoniaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 181.
* Cladonia boryi Tuck. [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 182. 2.
* This is probably a misidentification of Cladonia caroliniana. 183.
* Cladonia caespiticia (Pers.) Flörke [Cladoniaceae] 184. 1.
* Skorepa et al. (1977) – Worcester Co., on sandy soil. 2.
* Biechele (2002) – lower eastern shore of Maryland. 185. 3.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Carroll Co., Liberty Reservoir. 186.
* Cladonia cariosa (Ach.) Sprengel [Cladoniaceae] 187. 1.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight. 188.
* Cladonia caroliniana Tuck. [Cladoniaceae] 1.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 189.
* Cladonia cervicornis subsp. verticillata (Hoffm.) Ahti [Cladoniaceae] 190. 1.
* Syn.: Cladonia verticillata (Hoffm.) Schaer. 191. 2.
* Skorepa et al. (1977) – Queen Anne's Co., on soil. 3.
* Biechele (2002) – lower eastern shore of Maryland. 192. 4.
* E.G. Worthley Herbarium - Worcester Co.; Queen Anne's Co.; Baltimore Co. 193.
* Cladonia chlorophaea (Flörke ex Sommerf.) Sprengel [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Biechele (2002) – lower eastern shore of Maryland. 194. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Prince George's Co.; Anne Arundel Co.; Washington Co. 195.
* Cladonia coniocraea (Flörke) Sprengel [Cladoniaceae] 196. 1.
* Skorepa et al. (1977) – Garrett Co., on base of pine. 2.
* Biechele (2002) – lower eastern shore of Maryland. 197. 3.
* E.G. Worthley Herbarium - Baltimore Co.; Calvert Co. 198. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., Liberty Reservoir. 199.
* Cladonia cristatella Tuck. [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Biechele (2002) – lower eastern shore of Maryland. 200. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Prince George's Co.; Garrett Co., Swallow Falls. 201. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co., Greenbelt. 202.
* Cladonia didyma (Fée) Vainio var. didyma [Cladoniaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild) 203.
* Cladonia fimbriata (L.) Fr. [Cladoniaceae] 204. 1.
* Skorepa et al. (1977) – Garrett Co., on sandstone boulder. 205. 2.
* E.G. Worthley Herbarium - Garrett Co.; Allegany Co., Green Ridge State Forest. 206.
* Cladonia floerkeana (Fr.) Flörke [Cladoniaceae] 207. 1.
* Skorepa et al. (1977) – Harford Co., on rotting wood. 208.
* Cladonia furcata (Hudson) Schrader [Cladoniaceae] 209. 1.
* Skorepa et al. (1977) – Harford Co., on moss. 210.
* Cladonia gracilis (L.) Willd. subsp. gracilis [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight. 211.
* Cladonia grayi Merr. ex Sandst. [Cladoniaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 2.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 212. 3.
* Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake) 213.
* Cladonia incrassata Flörke [Cladoniaceae] 214. 1.
* Skorepa et al. (1977) – Wicomico Co., on sandy soil. 215. 2.
* Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) 216.
* Cladonia macilenta Hoffm. [Cladoniaceae] 1.
* Skorepa et al. (1977) – Harford Co., on rotting wood. 217. 2.
* E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir; Prince Georges Co., College Park. 3.
* Lendemer & Knapp (2007) - (2. Idylwild) 218.
* Cladonia macilenta var. bacillaris (Genth) Schaerer [Cladoniaceae] 219. 1.
* Syn.: Cladonia bacillaris (Ach.) Nyl. 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 3.
* Biechele (2002) – lower eastern shore of Maryland. 220. 4.
* E.G. Worthley Herbarium - Prince George's Co. 221. 5.
* E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir. 6.
* Lendemer & Knapp (2007) - (3. Chesapeake) 222.
* Cladonia mateocyatha Robbins [Cladoniaceae] 223. 1.
* Skorepa et al. (1977) – Baltimore Co., on exposed rocks. 224.
* Cladonia ochrochlora Flörke [Cladoniaceae] 225. 1.
* Lendemer & Knapp (2007) - (1. Millington) 226.
* Cladonia parasitica (Hoffm.) Hoffm. [Cladoniaceae] 227. 1.
* Skorepa et al. (1977) – Worcester Co., on pine stump. 2.
* Biechele (2002) – lower eastern shore of Maryland. 3.
* Lendemer & Knapp (2007) - (2. Idylwild) 228.
* Cladonia peziziformis (With.) J.R. Laundon [Cladoniaceae] 229. 1.
* Syn.: Cladonia capitata (Michx.) Spreng. 230. 2.
* Skorepa et al. (1977) – Kent Co., on embankment. 3.
* Biechele (2002) – lower eastern shore of Maryland. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight. 5.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co., Greenbelt. 231.
* Cladonia piedmontensis G. Merr. [Cladoniaceae] 232. 1.
* Skorepa et al. (1977) – Wicomico Co., on soil. 233. 2.
* E.G. Worthley Herbarium - Baltimore Co.; Wicomico Co. 234.
* Cladonia pleurota (Flörke) Schaerer [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Biechele (2002) – lower eastern shore of Maryland. 235.
* Cladonia polycarpia G. Merr. [Cladoniaceae] 1.
* Lendemer & Knapp (2007) - (3. Chesapeake) 236.
* Cladonia polycarpoides Nyl. [Cladoniaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 2.
* Lendemer & Knapp (2007) - (2. Idylwild) 237.
* Cladonia pyxidata (L.) Hoffm. [Cladoniaceae] 238. 1.
* Skorepa et al. (1977) – Allegany Co., on bank of stream. 239. 2.
* E.G. Worthley Herbarium - Allegany Co., Green Ridge State Forest; Anne Arundel Co.; Carroll Co.; Washington Co. 240.
* Cladonia ramulosa (With.) J.R. Laundon [Cladoniaceae] 241. 1.
* E.G. Worthley Herbarium - Worcester Co., Milburn Landing. 2.
* Lendemer & Knapp (2007) - (2. Idylwild) 242.
* Cladonia rangiferina (L.) F.H. Wigg. [Cladoniaceae] 243. 1.
* Skorepa et al. (1977) – Allegany Co., on soil. 244. 2.
* E.G. Worthley Herbarium - Calvert Co.; Wicomico Co. 245.
* Cladonia rappii A. Evans [Cladoniaceae] 246. 1.
* Syn.: Cladonia calycantha Del. ex Nyl. 247. 2.
* Skorepa et al. (1977) – Charles Co., on soil. 3.
* Biechele (2002) – lower eastern shore of Maryland. 4.
* E.G. Worthley Herbarium - Wicomico Co. 248.
* Cladonia ravenelii Tuck. [Cladoniaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 249.
* Cladonia rei Schaerer [Cladoniaceae] 250. 1.
* Syn.: Cladonia nemoxyna (Ach.) Nyl. 251. 2.
* Skorepa et al. (1977) – Garrett Co., on rocky soil. 252. 3.
* E.G. Worthley Herbarium - Garrett Co. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 253.
* Cladonia santensis Tuck. [Cladoniaceae] 254. 1.
* Skorepa et al. (1977) – Dorchester Co., on soil. 2.
* Biechele (2002) – lower eastern shore of Maryland. 255.
* Cladonia squamosa Hoffm. [Cladoniaceae] 256. 1.
* Skorepa et al. (1977) – Frederick Co., on basalt outcrop. 2.
* Biechele (2002) – lower eastern shore of Maryland. 257. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Washington Co. 4.
* Lendemer & Knapp (2007) - (6. Pocomoke) 258.
* Cladonia stellaris (Opiz) Pouzar & Vezda [Cladoniaceae] 259. 1.
* Syn.: Cladonia alpestris (L.) Rabenh. 2.
* Skorepa et al. (1977) – Garrett Co., on soil. 260.
* Cladonia strepsilis (Ach.) Grognot [Cladoniaceae] 261. 1.
* Skorepa et al. (1977) – Prince George's Co., on shoulder of road. 2.
* E.G. Worthley Herbarium - Prince George's Co. 262.
* Cladonia subcariosa Nyl. [Cladoniaceae] 263. 1.
* Syns.: Cladonia clavulifera Vain., C. sobolescens Nyl. ex Vain. 2.
* Skorepa et al. (1977) – Worcester Co., on sandy soil. 264. 3.
* Skorepa et al. (1977) – Kent Co., on soil. 265. 4.
* E.G. Worthley Herbarium - St. Mary's Co.; Wicomico Co. 266. 5.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co., Greenbelt. 6.
* Lendemer & Knapp (2007) - (2. Idylwild) 267.
* Cladonia subtenuis (Abbayes) Mattick [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Biechele (2002) – lower eastern shore of Maryland. 268. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Allegany Co.; Calvert County; St. Mary's Co. 269. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Prince George's Co. 270. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake), (4. Sharptown) 271.
* Cladonia turgida Hoffm. [Cladoniaceae] 1.
* Skorepa et al. (1977) – Wicomico Co., on soil. 272.
* Cladonia uncialis (L.) F.H. Wigg. [Cladoniaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Biechele (2002) – lower eastern shore of Maryland. 273.
* Coccocarpia palmicola (Sprengel) Arv. & D.J. Galloway [Coccocarpiaceae] 274. 1.
* Syn.: Coccocarpia cronia (Tuck.) Vain. 275. 2.
* Skorepa et al. (1977) – Montgomery Co., on rock outcrop. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 276.
* Coenogonium luteum (Dicks.) Kalb & Lücking [Gyalectaceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 277.
* Coenogonium pineti (Ach.) Kalb & Lücking [Gyalectaceae] 278. 1.
* Syn.: Dimerella diluta (Pers.) Trevisan 279. 2.
* Skorepa et al. (1979) – on wood, other. 3.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 280.
* Collema coccophorum Tuck. [Collemataceae] 1.
* Skorepa et al. (1979) – on acidic rock. 281.
* Collema conglomeratum Hoffm. [Collemataceae] 1.
* Skorepa et al. (1979) – on bark. 282.
* Collema furfuraceum (Arnold) Du Rietz [Collemataceae] 283. 1.
* Skorepa et al. (1977) – Allegany Co., on trunks of deciduous trees. 284. 2.
* Skorepa et al. (1979) – bark, acidic rock. 285. 3.
* E.G. Worthley Herbarium - Allegany Co., Terrapin Run, near base of tree trunk. 286.
* Collema fuscovirens (With.) J.R. Laundon [Collemataceae] 287. 1.
* Syn.: Collema tuniforme (Ach.) Ach. 2.
* Skorepa et al. (1979) – on calcareous rock. 288.
* Collema leptaleum Tuck. [Collemataceae] 1.
* Skorepa et al. (1979) – on bark. 289.
* Collema subflaccidum Degel. [Collemataceae] 1.
* Skorepa et al. (1979) – acidic rock. 290. 2.
* E.G. Worthley Herbarium - Baltimore Co., Gunpowder River, on bark of Tulip Tree. 291.
* Collema undulatum Laurer ex Flotow [Collemataceae] 1.
* Skorepa et al. (1979) – on acidic rock. 292.
* Cyphelium tigillare (Ach.) Ach. [Caliciaceae] 293. 1.
* Skorepa et al. (1979) – on wood. 294.
* Dactylospora inquilina Hafellner [Dactylosporaceae] 295. 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) (on Pertusaria paratuberculifera) 296.
* Dermatocarpon luridum (With.) J.R. Laundon [Verrucariaceae] 297. 1.
* Syn.: Dermatocarpon fluviatile (G. Web.) Th. Fr. 298. 2.
* Skorepa et al. (1977) – Baltimore Co., on rocks. 3.
* Skorepa et al. (1979) – on acidic rock. 299. 4.
* E.G. Worthley Herbarium - Carroll Co., in stream bed; Frederick Co., on boulder in stream. 300. 5.
* E.C. Uebel Herbarium – Baltimore Co., Hollofield, on moist rock. 301.
* Dermatocarpon miniatum (L.) W. Mann [Verrucariaceae] 302. 1.
* Skorepa et al. (1977) – Baltimore Co., on rock ledge. 303. 2.
* Skorepa et al. (1979) – on acidic rock, calcareous rock. 304. 3.
* E.G. Worthley Herbarium - Montgomery Co., Great Falls 305.
* Dibaeis baeomyces (L. f.) Rambold & Hertel [Icmadophilaceae] 306. 1.
* Syn.: Baeomyces roseus Pers. 307. 2.
* Skorepa et al. (1977) – Harford Co., on rock ledge. 3.
* Skorepa et al. (1979) – on soil. 4.
* Biechele (2002) – lower eastern shore of Maryland. 308. 5.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Howard Co. 309.
* Dimelaena oreina (Ach.) Norman [Physciaceae] 310. 1.
* Skorepa et al. (1977) – Allegany Co., on sandstone outcrop. 2.
* Skorepa et al. (1979) – on acidic rock. 311.
* Diploschistes scruposus (Schreber) Norman [Thelotremataceae] 1.
* Skorepa et al. (1979) – on acidic rock. 312.
* Dirinaria frostii (Tuck.) Hale & Culb. [Physciaceae] 313. 1.
* Skorepa et al. (1977) – Allegany Co., on shale outcrops. 2.
* Skorepa et al. (1979) – on acidic rock. 314.
* Endocarpon petrolepideum (Nyl.) Nyl. [Verrucariaceae] 315. 1.
* E.C. Uebel Herbarium – Prince George's Co., Greenbelt, on hill of concrete (identified by Dr. Othmar Breuss, Vienna, Austria, Mar 2005). 316.
* Endocarpon pusillum Hedwig [Verrucariaceae] 317. 1.
* Skorepa et al. (1977) – Washington Co., on chert. 2.
* Skorepa et al. (1979) – on calcareous rock, cement. 318.
* Ephebe lanata (L.) Vainio [Lichinaceae] 1.
* Skorepa et al. (1979) – on acidic rock. 319.
* Fissurina insidiosa Hook. & C. Knight [Graphidaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 320.
* Flavoparmelia baltimorensis (Gyelnik & Fóriss) Hale [Parmeliaceae] 321. 1.
* Syn.: Parmelia baltimorensis Gyelnik & Fóriss 322. 2.
* Skorepa et al. (1977) – Baltimore Co., on rock outcrops. 3.
* Skorepa et al. (1979) – on acidic rock. 323. 4.
* E.G. Worthley Herbarium - Harford Co., Rocks State Park, on acidic rock. 324. 5.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on boulders. 325.
* Flavoparmelia caperata (L.) Hale [Parmeliaceae] 326. 1.
* Syn.: Parmelia caperata (L.) Ach. 327. 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight, on rocks. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 4.
* Biechele (2002) – lower eastern shore of Maryland. 328. 5.
* E.G. Worthley Herbarium - Calvert Co.; Frederick Co.; Worcester Co., on bark. 329. 6.
* E.C. Uebel Herbarium – Prince George's Co., on fallen tree limbs. 7.
* Lendemer & Knapp (2007) - (4. Sharptown) 330.
* Flavopunctelia flaventior (Stirton) Hale [Parmeliaceae] 331. 1.
* Syn.: Parmelia flaventior Stirt. 332. 2.
* Skorepa et al. (1977) – Garrett Co., on oak. 3.
* Skorepa et al. (1979) – on bark. 333. 4.
* E.G. Worthley Herbarium - Allegany Co.; Garrett Co., Casselman Bridge State Park. 334.
* Flavopunctelia soredica (Nyl.) Hale [Parmeliaceae] 335. 1.
* Syn.: Parmelia ulophyllodes (Vaino) Savicz 2.
* Skorepa et al. (1979) – on bark. 336. 3.
* E.G. Worthley Herbarium - Baltimore Co., Gunpowder State Park. 4.
* E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. 337.
* Fuscopannaria leucophaea (Vahl) P.M. Jørg. [Pannariaceae] 338. 1.
* Syn.: Parmeliella microphylla (Sw.) Müll. Arg. 2.
* Skorepa et al. (1979) – on acidic rock. 339.
* Fuscopannaria leucosticta (Tuck.) P.M. Jørg. [Pannariaceae] 340. 1.
* Syn.: Pannaria leucosticta (Tuck.) Tuck. ex Nyl. 2.
* Skorepa et al. (1979) – on bark. 341.
* Gassicurtia vernicoma (Tuck.) Marbach [Physciaceae] 342. 1.
* Syn.: Buellia vernicoma (Tuck.) Tuck. 343. 2.
* Skorepa et al. (1977) – (collected by Plitt) 3.
* Skorepa et al. (1979) – on bark. 344.
* Graphis scripta (L.) Ach. [Graphidaceae] 345. 1.
* Skorepa et al. (1977) – Montgomery Co., on oak. 2.
* Skorepa et al. (1979) – on bark. 346. 3.
* E.G. Worthley Herbarium - Baltimore Co., Pretty Boy Reservoir; Wicomico Co. 347. 4.
* E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on tree bark. 348.
* Hafellia disciformis (Fr.) Marbach & H. Mayrhofer [Physciaceae] 349. 1.
* Syn.: Buellia disciformis (Fr.) Mudd 350. 2.
* Skorepa et al. (1977) – Anne Arundel Co. 3.
* Skorepa et al. (1979) – on bark. 351.
* Hertelidea botryosa (Fr.) Printzen & Kantvilas [Stereocaulaceae] 352. 1.
* Syn.: Lecidea botryosa (Fr.) Th. Fr. 2.
* Skorepa et al. (1979) – on wood. 353.
* Heterodermia albicans (Pers.) Swinscow & Krog [Physciaceae] 354. 1.
* Syn.: Heterodermia domingensis (Ach.) Trev. 355. 2.
* Skorepa et al. (1977) – Wicomico Co., on tree trunks. 3.
* Skorepa et al. (1979) – on bark. 356.
* Heterodermia appalachensis (Kurok.) Culb. [Physciaceae] 357. 1.
* Skorepa et al. (1977) – Baltimore Co., on trunk of oak. 358.
* Heterodermia granulifera (Ach.) Culb. [Physciaceae] 359. 1.
* Skorepa et al. (1977) – Montgomery Co., on trunk of Walnut tree. 2.
* Skorepa et al. (1979) – on bark. 360.
* Heterodermia hypoleuca (Muhl.) Trevisan [Physciaceae] 361. 1.
* Skorepa et al. (1977) – Frederick Co, on oak. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 362.
* Heterodermia obscurata (Nyl.) Trevisan [Physciaceae] 363. 1.
* Skorepa et al. (1977) – Charles Co., on trunks of deciduous trees. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 364. 3.
* E.G. Worthley Herbarium - Baltimore Co., Gunpowder Falls, on tree trunk. 365. 4.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) 366.
* Heterodermia speciosa (Wulfen) Trevisan [Physciaceae] 367. 1.
* Syn.: Heterodermia tremulans (Müll. Arg.) W. Culb. 368. 2.
* Skorepa et al. (1977) – Washington Co., on trunks of deciduous trees. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 369. 4.
* E.G. Worthley Herbarium - Baltimore Co., Pretty Boy Dam. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) 370.
* Hymenelia epulotica (Ach.) Lutzoni [Hymeneliaceae] 371. 1.
* Syn.: Ionaspis epulotica (Ach.) Blomb. & Forssell 2.
* Skorepa et al. (1979) – on acidic rock. 372.
* Hyperphyscia adglutinata (Flörke) H. Mayrh. [Physciaceae] 373. 1.
* Syn.: Physciopsis adglutinata (Flörke) M. Choisy 2.
* Skorepa et al. (1979) – on bark. 374.
* Hyperphyscia syncolla (Tuck. ex Nyl.) Kalb [Physciaceae] 375. 1.
* Syns.: Physcia syncolla Tuck. ex Nyl., Physciopsis syncolla (Tuck. ex Nyl.) Poelt 376. 2.
* Skorepa et al. (1977) – Wicomico Co., on oak trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 377.
* Hypocenomyce scalaris (Ach.) M. Choisy [Lecideaceae] 378. 1.
* Syn.: Lecidea scalaris (Ach. ex Lilj.) Ach. 379. 2.
* Skorepa et al. (1979) – on bark, wood. 380. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight, on trunk of pine. 381.
* Hypogymnia krogiae Ohlsson [Parmeliaceae] 382. 1.
* Skorepa et al. (1977) – Garrett Co., on conifer bark. 2.
* Skorepa et al. (1979) – on bark. 383.
* Hypogymnia physodes (L.) Nyl. [Parmeliaceae] 384. 1.
* Skorepa et al. (1977) – Garrett Co., on tree trunks. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 385. 3.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. 386.
* Hypotrachyna livida (Taylor) Hale [Parmeliaceae] 387. 1.
* Syn.: Parmelia livida Taylor 388. 2.
* Skorepa et al. (1977) – Sommerset Co., on branches of deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 389. 5.
* E.G. Worthley Herbarium - Wicomico Co.; Worcester Co., Milburn Landing, on branches. 6.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) 390.
* Hypotrachyna osseoalba (Vainio) Park & Hale [Parmeliaceae] 391. 1.
* Syn.: Parmelia formosana Zahlbr. 392. 2.
* Skorepa et al. (1977) – Dorchester Co., on oak trunk. 3.
* Skorepa et al. (1979) – on bark. 4.
* Lendemer & Knapp (2007) - (4. Sharptown) 393.
* Imshaugia aleurites (Ach.) S.F. Meyer [Parmeliaceae] 394. 1.
* Syn.: Parmeliopsis aleurites (Ach.) Nyl. 395. 2.
* Skorepa et al. (1977) – Garrett Co., on oak trunk. 396. 3.
* Skorepa et al. (1979) – on bark, acidic rock, wood. 397. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight, on Virginia pines. 398. 5.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight, on trunks of pines. 399.
* Imshaugia placorodia (Ach.) S.F. Meyer [Parmeliaceae] 400. 1.
* Syn.: Parmeliopsis placorodia (Ach.) Nyl. 401. 2.
* Skorepa et al. (1977) – Harford Co., on pine trees. 3.
* Skorepa et al. (1979) – on bark. 402. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight, on pine branches. 403. 5.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight, on branches of Virginia pines. 404.
* Julella fallaciosa (Arnold) R.C. Harris (Not lichenized.) [Thelenellaceae] 405. 1.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of Tulip Tree. 406.
* Lasallia papulosa (Ach.) Llano [Umbilicariaceae] 407. 1.
* Syn.: Umbilicaria papulosa (Ach.) Nyl. 408. 2.
* Skorepa et al. (1977) – Baltimore Co., on rocks on hillside. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 409. 4.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls; Montgomery Co., Great Falls. 410.
* Lasallia pensylvanica (Hoffm.) Llano [Umbilicariaceae] 411. 1.
* Syn.: Umbilicaria pensylvanica Hoffm. 412. 2.
* Skorepa et al. (1977) – Harford Co., on rock outcrops. 3.
* Skorepa et al. (1979) – on acidic rock. 413. 4.
* E.G. Worthley Herbarium - Washington Co., Wash. Monument State Park, on rocks. 414.
* Lasallia pustulata (L.) Mérat [Umbilicariaceae] 415. 1.
* E.G. Worthley Herbarium - Frederick Co., South Mt.; Montgomery Co., Sugarloaf Mt., on boulders. 416.
* Lecanora albella (Pers.) Ach. var. albella [Lecanoraceae] 417. 1.
* E.G. Worthley Herbarium - Worcester Co., on bark of Pinus taeda. 418.
* Lecanora cadubriae (A. Massal.) Hedl. [Lecanoraceae] 1.
* Skorepa et al. (1979) – on bark. 419.
* Lecanora caesiorubella Ach. subsp. caesiorubella [Lecanoraceae] 420. 1.
* Skorepa et al. (1977) – Harford Co., on trunk of oak. 2.
* Skorepa et al. (1979) – on bark. 421. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Wicomico Co. 422.
* Lecanora campestris (Schaerer) Hue [Lecanoraceae] 1.
* Skorepa et al. (1977) – Allegany Co., on shale outcrop. 2.
* Skorepa et al. (1979) – on acidic rock. 423.
* Lecanora chlarotera Nyl. [Lecanoraceae] 1.
* Skorepa et al. (1977) – Calvert Co., on trunks of deciduous trees. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 424.
* Lecanora cinereofusca H. Magn. [Lecanoraceae] 425. 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) 426.
* Lecanora dispersa (Pers.) Sommerf. [Lecanoraceae] 427. 1.
* Skorepa et al. (1977) – Washington Co., on stone wall. 428. 2.
* Skorepa et al. (1979) – on calcareous rock, cement, other. 429. 3.
* E.G. Worthley Herbarium - Baltimore Co.; Washington Co., on rock outcrops. 430.
* Lecanora expallens Ach. [Lecanoraceae] 431. 1.
* Syn.: Lecanora conizea (Ach.) Nyl. 432. 2.
* Skorepa et al. (1977) – St. Mary's Co., on trunks of Black Locust. 3.
* Skorepa et al. (1979) – on bark, wood. 433. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; St. Mary' Co., on trunk of Black Locust. 434.
* Lecanora hagenii (Ach.) Ach. [Lecanoraceae] 435. 1.
* Skorepa et al. (1977) – Frederick Co., on old timbers. 2.
* Skorepa et al. (1979) – on wood. 436.
* Lecanora hybocarpa (Tuck.) Brodo [Lecanoraceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 437. 2.
* Lendemer & Knapp (2007) - (1. Millington), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) 438.
* Lecanora imshaugii Brodo [Lecanoraceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 439.
* Lecanora minutella Nyl. [Lecanoraceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild) 440.
* Lecanora muralis (Schreber) Rabenh. [Lecanoraceae] 441. 1.
* Skorepa et al. (1977) – Montgomery Co., on rock ledges. 442.
* Lecanora muralis var. versicolor (Pers.) Tuck. [Lecanoraceae] 443. 1.
* Syn.: Lecanora versicolor (Pers.) Ach. 2.
* Skorepa et al. (1977) – Washington Co., on stone wall. 3.
* Skorepa et al. (1979) – on acidic rock. 4.
* Skorepa et al. (1979) – on acidic rock, calcareous rock. 444. 5.
* E.G. Worthley Herbarium - Washington Co., C & 0 canal, on shale. 445.
* Lecanora polytropa (Hoffm.) Rabenh. [Lecanoraceae] 1.
* Skorepa et al. (1979) – on acidic rock. 446.
* Lecanora pulicaris (Pers.) Ach. [Lecanoraceae] 447. 1.
* Syn.: Lecanora coilocarpa (Ach.) Nyl. 448. 2.
* Skorepa et al. (1977) – Calvert Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. 449.
* Lecanora strobilina (Spreng.) Kieffer [Lecanoraceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 450. 2.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple; Prince George's Co., on bark of pines. 3.
* Lendemer & Knapp (2007) - (2. Idylwild) 451.
* Lecanora subpallens Zahlbr. - [Lecanoraceae] 452. 1.
* Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown) 453.
* Lecanora thysanophora R.C. Harris [Lecanoraceae] 454. 1.
* Thomas E. Wilson, III (4 Dec 2006) – IMG_9960.JPG, photographed on tree trunk in woodland on eastern side of Baltimore County, MD. 455. 2.
* Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.) 456.
* Lecanora xylophila Hue [Lecanoraceae] 457. 1.
* Syn.: Lecanora laevis Poelt (N.A. records are L. xylophila) 458. 2.
* Skorepa et al. (1977) – Baltimore Co., on wave-washed timbers. 3.
* Skorepa et al. (1979) – on wood. 459.
* Lecidea cyrtidia Tuck. [Lecideaceae] 460. 1.
* Skorepa et al. (1977) – Washington Co., on rocks. 2.
* Skorepa et al. (1979) – on acidic rock. 461.
* Lecidea plebeja Nyl. [Lecideaceae] 462. 1.
* Syn.: Lecidea myriocarpoides Nyl. 2.
* Skorepa et al. (1979) – on wood. 3.
* Lendemer & Knapp (2007) - (2. Idylwild) 463.
* Lecidella stigmatea (Ach.) Hertel & Leuckert [Lecanoraceae] 464. 1.
* Syn.: Lecidea stigmatea Ach. 2.
* Skorepa et al. (1979) – on acidic rock. 465.
* Lepraria caesiella R.C. Harris [Family Not Determined] 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) 466.
* Lepraria aff. incana (L.) Ach. [Family Not Determined] 467. 1.
* Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild) 468.
* Lepraria lobificans Nyl. [Family Not Determined] 469. 1.
* Syn.: Lepraria finkii (B. de Lesd.) R.C. Harris 470. 2.
* E.G. Worthley Herbarium - Baltimore Co., Gunpowder River Area, on Quercus alba. 471. 3.
* E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, rock near water. 4.
* Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake) 472.
* Lepraria membranacea (Dickson) Vainio [Family Not Determined] 473. 1.
* Syn.: Leproloma membranaceum (Dickson) Vainio 2.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. 474.
* Lepraria neglecta (Nyl.) Erichsen [Family Not Determined] 475. 1.
* Syn.: Lepraria zonata Brodo = L.caesioalba or L. neglecta. 476. 2.
* Skorepa et al. (1977) – Baltimore Co., on acid rocks. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 4.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls; Montgomery Co., Great Falls. 477.
* Leptogium azureum (Sw.) Mont. [Collemataceae] 478. 1.
* Skorepa et al. (1977) – Montgomery Co., Plummers Is. (collected by Fink). 2.
* Skorepa et al. (1979) – on acidic rock. 479.
* Leptogium cyanescens (Rabenh.) Körber [Collemataceae] 480. 1.
* Skorepa et al. (1977) – Worcester Co., on trunks of deciduous trees. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 3.
* Biechele (2002) – lower eastern shore of Maryland. 481. 4.
* E.G. Worthley Herbarium - Baltimore Co., Gunpowder River, on vertical rocks; Frederick Co., Cunningham Falls. 5.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 482.
* Leptogium lichenoides (L.) Zahlbr. [Collemataceae] 483. 1.
* Skorepa et al. (1977) – Allegany Co., on bark of deciduous trees. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 484.
* Leptogium phyllocarpum (Pers.) Mont. [Collemataceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 485.
* Leptogium subtile (Schrader) Torss. [Collemataceae] 486. 1.
* Syn.: Leptogium minutissimum (Flörke) Fr. 487. 2.
* Skorepa et al. (1977) – Montgomery Co., on rock ledge. 3.
* Skorepa et al. (1979) – on acidic rock. 488.
* Lichenoconium erodens M.S. Christ. & D. Hawksw. [Anamorphic Ascomycetes] 489. 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) (on Lecanora cinereofusca) 490.
* Lichenodiplis lecanorae (Vouaux) Dyko & D. Hawksw. [Anamorphic Ascomycetes] 491. 1.
* E.C. Uebel Herbarium – Baltimore Co., Liberty 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. 492.
* Lobaria pulmonaria (L.) Hoffm. [Lobariaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Biechele (2002) – lower eastern shore of Maryland. 3.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. 493.
* Lobaria quercizans Michaux [Lobariaceae] 494. 1.
* Skorepa et al. (1977) – Garrett Co., on trunk of deciduous tree. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 4.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. 5.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 495.
* Loxospora pustulata (Brodo & Culb.) R.C. Harris [Loxosporaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) 496.
* Melanelia culbersonii (Hale) Thell [Parmeliaceae] 497. 1.
* Syn.: Cetraria culbersonii Hale 498. 2.
* Skorepa et al. (1977) – Allegany Co., on exposed rock. 3.
* Skorepa et al. (1979) – on acidic rock. 499. 4.
* E.G. Worthley Herbarium - Allegany Co., Dans Rock Overlook. 500.
* Melanelixia subaurifera (Nyl.) O. Blanco et al. [Parmeliaceae] 501. 1.
* Syns.: Parmelia subaurifera Nyl., Melanelia subaurifera (Nyl.) Essl. 502. 2.
* Skorepa et al. (1977) – Allegany Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. 503.
* Melanohalea exasperata (De Not.) O. Blanco et al.. [Parmeliaceae] 504. 1.
* Syns.: Parmelia exasperata De Not., Melanelia exasperata (De Not.) Essl. 2.
* Skorepa et al. (1979) – on bark. 3.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills. 505.
* Metamelanea melambola (Tuck.) Henssen [Lichinaceae] 506. 1.
* Syn.Pyrenopsis melambola (Tuck.) Tuck. 2.
* Skorepa et al. (1979) – on calcareous rock. 507.
* Micarea erratica (Körber) Hertel, Rambold & Pietschmann [Micareaceae] 508. 1.
* Syn.: Lecidea erratica Körber 509. 2.
* Skorepa et al. (1977) – Baltimore Co., on pebbles. 3.
* Skorepa et al. (1979) – on acidic rock. 510. 4.
* E.G. Worthley Herbarium - Garrett Co., Carey Run, in open field. 5.
* Lendemer & Knapp (2007) - (2. Idylwild) 511.
* Minutoexcipula mariana V. Atienza* (on Pertusaria) [Family Not Determined] 1.
* Lendemer & Knapp (2007) - (4. Sharptown) 512.
* Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth [Porpidiaceae] 513. 1.
* Syn.: Lecidea berengeriana (Massal.) Nyl. 514. 2.
* Skorepa et al. (1977) – Frederick Co., on oak trunks. 3.
* Skorepa et al. (1979) – on bark. 515. 4.
* E.G. Worthley Herbarium - Montgomery Co., Great Falls, on old wood. 516.
* Myelochroa aurulenta (Tuck.) Elix & Hale [Parmeliaceae] 517. 1.
* Syns: Parmelia aurulenta Tuck. 2.
* Skorepa et al. (1977) – Baltimore Co., on rocks. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 518. 4.
* E.G. Worthley Herbarium - Baltimore Co., along Gunpowder River, on rock outcrops. 519. 5.
* E.C. Uebel Herbarium – Baltimore County, Liberty Reservoir; Prince George's Co., on bark. 6.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 520.
* Myelochroa galbina (Ach.) Elix & Hale [Parmeliaceae] 521. 1.
* Syn.: Parmelia galbina Ach. 2.
* Skorepa et al. (1977) – Allegany Co., on trunks of deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 522. 4.
* E.G. Worthley Herbarium - Allegany Co., along Terrapin Run, on trunks of deciduous trees. 5.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 523.
* Myelochroa metarevoluta (Asah.) Elix & Hale [Parmeliaceae] 524. 1.
* Syn.: Parmelia metarevoluta (Asahina) Hale 525. 2.
* Skorepa et al. (1977) – Montgomery Co., on oak trunk. 3.
* Skorepa et al. (1979) – on bark. 526.
* Myelochroa obsessa (Ach.) Elix & Hale [Parmeliaceae] 527. 1.
* Syn.: Parmelia obsessa Ach. 2.
* Skorepa et al. (1977) – Baltimore Co., on acid rocks. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 528. 4.
* E.G. Worthley Herbarium - Baltimore Co., near Little Gunpowder River, on rock ledges. 529.
* Nadvornikia sorediata R.C. Harris [Thelotremataceae] 530. 1.
* Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.), (6. Pocomoke) 531.
* Nephroma helveticum Ach. subsp. helveticum [Nephromataceae] 1.
* Skorepa et al. (1977) – Montgomery Co., Plummers Is. (collected by Fink). 2.
* Skorepa et al. (1979) – on acidic rock. 532.
* Normandina pulchella (Borrer) Nyl. [Verrucariaceae] 1.
* Skorepa et al. (1979) – on bark. 533.
* Ochrolechia androgyna (Hoffm.) Arnold [Pertusariaceae] 1.
* Skorepa et al. (1977) – Anne Arundel Co. 2.
* Skorepa et al. (1979) – on acidic rock. 534.
* Ochrolechia cinera Chev. [Pertusariaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 535.
* Ochrolechia pseudopallescens Brodo [Pertusariaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 536.
* Ochrolechia trochophora var. trochophora (Vainio) Oshio [Pertusariaceae] 537. 1.
* Syn.: Ochrolechia rosella (Müll. Arg.) Vers. 2.
* Biechele (2002) – lower eastern shore of Maryland. 538.
* Ochrolechia yasudae Vainio [Pertusariaceae] 539. 1.
* Skorepa et al. (1977) – Frederick Co. (collected by Plitt). 2.
* Skorepa et al. (1979) – on acidic rock. 540.
* Opegrapha varia Pers. [Roccellaceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 541.
* Opegrapha viridis Pers. [Roccellaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 542.
* Opegrapha vulgata Ach. [Roccellaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake), (4. Sharptown) 543.
* Pannaria conoplea (Ach.) Bory [Pannariaceae] 544. 1.
* Syn.: Pannaria pityrea auct. 2.
* Skorepa et al. (1979) – on bark. 545.
* Pannaria lurida (Mont.) Nyl. [Pannariaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Biechele (2002) – lower eastern shore of Maryland. 546.
* Parmelia saxatilis (L.) Ach. [Parmeliaceae] 547. 1.
* Skorepa et al. (1977) – Frederick Co., in mature oak woods. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 548. 3.
* E.G. Worthley Herbarium - Baltimore Co., along Gunpowder River, on bark of Quercus velutina. 549.
* Parmelia squarrosa Hale [Parmeliaceae] 550. 1.
* Skorepa et al. (1977) – Garrett Co., on Acer. 2.
* Skorepa et al. (1979) – on bark. 3.
* Lendemer & Knapp (2007) - (6. Pocomoke) 551.
* Parmelia sulcata Taylor [Parmeliaceae] 552. 1.
* Skorepa et al. (1977) – Washington Co., on deciduous trees. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 553. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Carroll Co., on bark of Fraxinus americana. 4.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. 554.
* Parmelinopsis horrescens (Taylor) Elix & Hale [Parmeliaceae] 555. 1.
* Syn.: Parmelia horrescens Taylor 556. 2.
* Skorepa et al. (1977) – Calvert Co., on trunks of pines. 3.
* Skorepa et al. (1979) – on bark. 557. 4.
* E.G. Worthley Herbarium - Worcester Co., Milburn Landing, on bark of Pinus taeda. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) 558.
* Parmelinopsis minarum (Vainio) Elix & Hale [Parmeliaceae] 559. 1.
* Syn.: Parmelia dissecta Nyl. 560. 2.
* Skorepa et al. (1977) – Frederick Co., on oak trunk. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight. 561. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.) 562.
* Parmeliopsis ambigua (Wulfen) Nyl. [Parmeliaceae] 1.
* Skorepa et al. (1977) – Garrett Co., on trunk of deciduous tree. 2.
* Skorepa et al. (1979) – on bark. 3.
* E.G. Worthley Herbarium - Worcester Co., Milburn Landing, on bark of Pinus taeda. 563.
* Parmeliopsis hyperopta (Ach.) Arnold [Parmeliaceae] 564. 1.
* Syn.: Parmeliopsis diffusa (Weber) Riddle 2.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills. 565.
* Parmeliopsis subambigua Gyelnik [Parmeliaceae] 566. 1.
* Syn.: Parmeliopsis halei (Tuck.) Hale 567. 2.
* Skorepa et al. (1977) – Worcester Co., on pine trunks. 3.
* Skorepa et al. (1979) – on bark. 568. 4.
* Lendemer & Knapp (2007) - (4. Sharptown), (6. Pocomoke) 569.
* Parmotrema cetratum (Ach.) Hale [Parmeliaceae] 570. 1.
* Syns.: Parmelia cetrata Ach, Rimelia cetrata (Ach.) Hale & Fletcher 571. 2.
* Skorepa et al. (1977) – Worcester Co., on trunk of Sweet gum. 3.
* Skorepa et al. (1979) – on bark. 572.
* Parmotrema chinense (Osbeck) Hale & Ahti [Parmeliaceae] 573. 1.
* Syn.: Parmotrema perlatum (Huds.) Choisy 574. 2.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple, on oak limb. 575.
* Parmotrema crinitum (Ach.) M. Choisy [Parmeliaceae] 576. 1.
* Syn.: Parmelia crinita Ach. 577. 2.
* Skorepa et al. (1977) – Worcester Co., on trunk of pine. 3.
* Skorepa et al. (1979) – on bark. 578. 4.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills, on trees. 579.
* Parmotrema dilatatum (Vainio) Hale [Parmeliaceae] 580. 1.
* Syn.: Parmelia dilatata Vainio 581. 2.
* Skorepa et al. (1977) – Dorchester Co., on trunks of deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 582.
* Parmotrema eurysacum (Hue) Hale [Parmeliaceae] 583. 1.
* Syn.: Parmelia eurysaca Hue 584. 2.
* Skorepa et al. (1977) – Baltimore Co. (collected by Plitt). 3.
* Skorepa et al. (1979) – on bark. 585.
* Parmotrema gardneri (Dodge) Serux. [Parmeliaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 586.
* Parmotrema hypoleucinum (B. Stein) Hale [Parmeliaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 587.
* Parmotrema hypoleucinum (J. Steiner) Hale [Parmeliaceae] 1.
* Lendemer & Knapp (2007) - (4. Sharptown), (6. Pocomoke) 588.
* Parmotrema hypotropum (Nyl.) Hale [Parmeliaceae] 589. 1.
* Syn.: Parmelia hypotropa Nyl. 590. 2.
* Skorepa et al. (1977) – Kent Co., on trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 591. 5.
* E.G. Worthley Herbarium - Kent Co., on trees; Somerset Co., on deciduous trees; Wicomico Co.; Worcester Co., on bark of Pinus taeda. 592. 6.
* E.C. Uebel Herbarium – Baltimore Co.; Prince George's Co., on bark and boulder. 593. 7.
* Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown), (6. Pocomoke) 594.
* Parmotrema margaritatum (Hue) Hale [Parmeliaceae] 595. 1.
* Syn.: Parmelia margaritata Hue 2.
* Skorepa et al. (1979) – on bark. 596.
* Parmotrema perforatum (Jacq.) A. Massal. [Parmeliaceae] 597. 1.
* Syn.: Parmelia perforata (Jacq.) Ach. 598. 2.
* Skorepa et al. (1977) – Charles Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 599. 5.
* E.G. Worthley Herbarium - Prince George's Co., on bark of oak; Worcester Co., Milburn Landing. 6.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 600.
* Parmotrema reticulatum (Taylor) M. Choisy [Parmeliaceae] 601. 1.
* Syns.: Parmelia reticulata Taylor, Rimelia reticulata (Taylor) Hale & Fletcher 2.
* Skorepa et al. (1977) – Charles Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 602. 5.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Worcester Co., on bark of Taxodium and Acer rubrum. 6.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 603.
* Parmotrema stuppeum (Taylor) Hale [Parmeliaceae] 604. 1.
* Syn.: Parmelia stuppea Taylor 605. 2.
* Skorepa et al. (1977) – Garrett Co., on trunk of oak. 3.
* Skorepa et al. (1979) – on bark. 4.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple. 606.
* Parmotrema subisidiosum (Müll. Arg.) Hale 1.
* Biechele (2002) – lower eastern shore of Maryland. 2.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) 607.
* Parmotrema submarginale (Michx.) DePriest & Hale [Parmeliaceae] 608. 1.
* Syn.: Parmelia michauxiana Zahlbr. 2.
* Skorepa et al. (1977) – Charles Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 609. 4.
* E.G. Worthley Herbarium - Calvert Co., Battle Creek Cypress Swamp, on bark; Worcester Co., Milburn Landing, on deciduous trees. 610. 5.
* Lendemer & Knapp (2007) - (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) 611.
* Parmotrema subtinctorium (Zahlbr.) Hale [Parmeliaceae] 612. 1.
* Syn.: Parmelia subcrinita Nyl. 613. 2.
* Skorepa et al. (1977) – Somerset Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 614.
* Parmotrema xanthinum (Müll. Arg.) Hale [Parmeliaceae] 615. 1.
* Syn.: Parmelia xanthina (Müll. Arg.) Vainio 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 4.
* Lendemer & Knapp (2007) - (6. Pocomoke) 616.
* Peltigera aphthosa (L.) Willd. [Peltigeraceae] 617. 1.
* Skorepa et al. (1977) – No County, (Thomson, 1940). 618.
* Peltigera canina (L.) Willd. [Peltigeraceae] 619. 1.
* Skorepa et al. (1977) – Garrett Co., with moss on sandstone. 620. 2.
* E.G. Worthley Herbarium - Garrett Co., Casselman Bridge State Park, on sandstone rocks; Wicomico Co., on sandy soil. 621.
* Peltigera didactyla (With.) J. R. Laundon [Peltigeraceae] 622. 1.
* Syn.: Peltigera spuria (Ach.) DC. 623. 2.
* Skorepa et al. (1977) – Washington Co., on rock in seepage area. 624.
* Peltigera elisabethae Gyelnik [Peltigeraceae] 625. 1.
* Skorepa et al. (1977) – Baltimore Co., with moss on wet rocks. 626.
* Peltigera evansiana Gyelnik [Peltigeraceae] 627. 1.
* Skorepa et al. (1977) – Baltimore Co., (collected by Plitt). 628.
* Peltigera horizontalis (Hudson) Baumg. [Peltigeraceae] 629. 1.
* Skorepa et al. (1977) – Baltimore Co., (collected by Merrill 1906). 630.
* Peltigera neckeri Müll. Arg. [Peltigeraceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 631.
* Peltigera polydactylon (Necker) Hoffm. [Peltigeraceae] 632. 1.
* Skorepa et al. (1977) – Garrett Co., on moss covered rocks. 633.
* Peltigera praetextata (Flörke ex Sommerf.) Zopf [Peltigeraceae] 634. 1.
* Skorepa et al. (1977) – Dorchester Co., at base of tree. 2.
* Biechele (2002) – lower eastern shore of Maryland. 3.
* Lendemer & Knapp (2007) - (3. Chesapeake) 635.
* Peltigera rufescens (Weiss) Humb. [Peltigeraceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 636.
* Peltula euploca (Ach.) Poelt [Peltulaceae] 1.
* Skorepa et al. (1979) – on soil. 637.
* Pertusaria amara (Ach.) Nyl. [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 638.
* Pertusaria epixantha R.C. Harris [Pertusariaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 639.
* Pertusaria globularis (Ach.) Tuck. [Pertusariaceae] 640. 1.
* Skorepa et al. (1979) – on other. 641.
* Pertusaria hypothamnolica Dibben [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 642.
* Pertusaria macounii (Lamb) Dibben [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 643.
* Pertusaria multipunctoides Dibben [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Biechele (2002) – lower eastern shore of Maryland. 644. 3.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on trunk of Carya. 4.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 645.
* Pertusaria ophthalmiza (Nyl.) Nyl. [Pertusariaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 2.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 646.
* Pertusaria paratuberculifera Dibben [Pertusariaceae] 647. 1.
* Pertusaria tuberculifera Nyl is misidentification for N.A., most specimens are P. paratuberculifera. 2.
* Skorepa et al. (1977) – Frederick Co., on oak trunks. 3.
* Skorepa et al. (1979) – on bark. 648. 4.
* Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) 649.
* Pertusaria plittiana Erichsen [Pertusariaceae] 1.
* Skorepa et al. (1979) – on acidic rock. 650.
* Pertusaria propinqua Müll. Arg. [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Lendemer & Knapp (2007) - (6. Pocomoke) 651.
* Pertusaria pustulata (Ach.) Duby [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 652. 2.
* E.C. Uebel Herbarium – Prince George's Co., on dead limb of deciduous tree. 3.
* Lendemer & Knapp (2007) - (1. Millington) 653.
* Pertusaria rubefacta Erichsen [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 654.
* Pertusaria subpertusa Brodo [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) 655.
* Pertusaria tetrathalamia (Fée) Nyl. [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 656.
* Pertusaria texana Müll. Arg. [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 2.
* Lendemer & Knapp (2007) - (2. Idylwild) 657.
* Pertusaria trachythallina Erichsen [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 658.
* Pertusaria velata (Turner) Nyl. [Pertusariaceae] 659. 1.
* Skorepa et al. (1977) – Frederick Co., in oak woods. 2.
* Skorepa et al. (1979) – on bark. 3.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) 660.
* Pertusaria waghornei Hulting [Pertusariaceae] 1.
* Skorepa et al. (1979) – on bark. 661.
* Pertusaria xanthodes Müll. Arg. [Pertusariaceae] 662. 1.
* Skorepa et al. (1977) – Harford Co., on tree bark. 2.
* Skorepa et al. (1979) – on bark. 663. 3.
* E.G. Worthley Herbarium - Calvert Co.; Frederick Co.; Washington Co., on bark of Quercus velutina. 664. 4.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of dead oak branch. 665.
* Phaeocalicium curtisii (Tuck.) Tibell [Mycocaliciaceae] 666. 1.
* E.G. Worthley Herbarium - Baltimore Co., on twigs of Rhus glabra. 667.
* Phaeocalicium polyporaeum (Nyl.) Tibell [Mycocaliciaceae] 668. 1.
* E.C. Uebel Herbarium – a specimen 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. 2.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (6. Pocomoke) 669.
* Phaeographis inusta (Ach.) Müll. Arg. [Graphidaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown) 670.
* Phaeophyscia adiastola (Essl.) Essl. [Physciaceae] 671. 1.
* Syns.: Physcia orbicularis (Necker) Poetsch; Phaeophyscia orbicularis (Necker) Moberg 672. 2.
* Skorepa et al. (1977) – Allegany Co., on oak trunk. 673. 3.
* Skorepa et al. (1979) – on bark, acidic rock, other. 674. 4.
* E.G. Worthley Herbarium – Worcester Co., on bark of Taxodium; Frederick Co., Cunningham Falls; Baltimore Co., Church of the Brethren. 675.
* Phaeophysica ciliata (Hoffm.) Moberg [Physciaceae] 676. 1.
* Syn.: Physcia ciliata (Hoffm.) Du Rietz 677. 2.
* Skorepa et al. (1977) – Caroline Co., on cement bridge. 3.
* Skorepa et al. (1979) – on bark. 678.
* Phaeophyscia hirsuta (Mereschk.) Essl. [Physciaceae] 679. 1.
* Syns.: Physcia hirsuta Mereschk., Phaeophyscia cernohorskyi (Nádv.) Essl. 2.
* Skorepa et al. (1979) – on cement. 680.
* Phaeophyscia hirtella Essl. [Physciaceae] 1.
* Skorepa et al. (1979) – on bark. 681.
* Phaeophyscia hispidula (Ach.) Essl. [Physciaceae] 682. 1.
* Syn.: Phaeophyscia imbricata Vainio 2.
* Skorepa et al. (1979) – on bark. 683.
* Phaeophyscia pusilloides (Zahlbr.) Essl. [Physciaceae] 684. 1.
* Syn.: Physcia pusilloides Zahlbr. 685. 2.
* Skorepa et al. (1977) – Frederick Co., on trees. 3.
* Skorepa et al. (1979) – on bark. 686. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., on bark of Norway Maple; 687.
* Phaeophyscia rubropulchra (Degel.) Essl. [Physciaceae] 688. 1.
* Syn.: Physcia orbicularis f. rubropulchra Degel. 689. 2.
* Skorepa et al. (1977) – Garrett Co., in upland woods. 3.
* Skorepa et al. (1979) – on bark, acidic rock, other. 4.
* Biechele (2002) – lower eastern shore of Maryland. 690. 5.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., Liberty Reservoir, on trunk of Tulip tree. 6.
* Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild) 691.
* Phlyctis ludoviciensis (Müll. Arg.) Lendemer [Phlyctidaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 692.
* Physcia adscendens (Fr.) H. Olivier [Physciaceae] 1.
* Skorepa et al. (1977) – Allegany Co., on deciduous trees. 693. 2.
* Skorepa et al. (1979) – on bark, calcareous rock. 694. 3.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., St. Thomas Cemetery, on gravestone. 695.
* Physcia aipolia (Ehrh. ex Humb.) Fürnr. var. aipolia [Physciaceae] 696. 1.
* Skorepa et al. (1977) – Worcester Co., on deciduous trees. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 697. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Frederick Co., Cunningham Falls. 698. 5.
* E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on bark; Baltimore Co., on Norway Maple. 699.
* Physcia americana G. Merr. [Physciaceae] 700. 1.
* Syn.: Physcia tribacoides Nyl. 2.
* Skorepa et al. (1977) – Worcester Co., on deciduous trees. 701. 3.
* Skorepa et al. (1979) – on bark, acidic rock, calcareous rock. 702. 4.
* E.G. Worthley Herbarium - Baltimore Co., Grace Methodist Church, Gunpowder River, on Tulip Tree; Frederick Co., Cunningham Falls. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.) 703.
* Physcia millegrana Degel. [Physciaceae] 1.
* Skorepa et al. (1977) – Garrett Co., on oak. 2.
* Skorepa et al. (1979) – on bark, acidic rock. 3.
* Biechele (2002) – lower eastern shore of Maryland. 704. 4.
* E.G. Worthley Herbarium - Calvert Co.; Wicomico Co.; Carroll Co., Falls Realty Company, on cement steps. 705. 5.
* E.C. Uebel Herbarium – Prince Georges Co., on dead limb; Carroll Co., Liberty Reservoir, on bark. 6.
* Lendemer & Knapp (2007) - (2. Idylwild) 706.
* Physcia phaea (Tuck.) J.W. Thomson [Physciaceae] 707. 1.
* Skorepa et al. (1977) – Baltimore Co., (collected by Plitt 1909) 2.
* Skorepa et al. (1979) – on acidic rock. 708.
* Physcia pseudospeciosa J.W. Thomson [Physciaceae] 1.
* Skorepa et al. (1977) – Baltimore Co., on acid rocks. 2.
* Skorepa et al. (1979) – on acidic rock. 709. 3.
* E.G. Worthley Herbarium - Baltimore Co., near Gunpowder River, on vertical acidic rocks. 710.
* Physcia pumilior R.C. Harris [Physciaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild) 711.
* Physcia stellaris (L.) Nyl. [Physciaceae] 712. 1.
* Skorepa et al. (1977) – Baltimore Co., on oak. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 713. 4.
* E.C. Uebel Herbarium – Baltimore Co., on bark of Norway Maple; Prince George's Co., on bark. 714.
* Physcia subtilis Degel. [Physciaceae] 1.
* Skorepa et al. (1977) – Montgomery Co., on rock ledges. 2.
* Skorepa et al. (1979) – on acidic rock. 3.
* E.G. Worthley Herbarium - Frederick Co., Cunningham Falls. 715.
* Physciella chloantha (Ach.) Essl. [Physciaceae] 716. 1.
* Syn.: Physcia luganensis Mereschk. 717. 2.
* Skorepa et al. (1977) – Queen Anne's Co., on cement bridge. 718. 3.
* Skorepa et al. (1979) – on bark, cement. 719. 4.
* E.C. Uebel Herbarium – Prince George's Co., along bike path, on concrete; on tree branch. 720.
* Physconia detersa (Nyl.) Poelt [Physciaceae] 721. 1.
* Skorepa et al. (1979) – on bark, calcareous rock, cement. 722. 2.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Green Spring Valley, on brick wall; on old cement bridge. 723.
* Placidium arboreum (Schwein. ex Michener) Lendemer [Verrucariaceae] 724. 1.
* Syn.: Dermatocarpon tuckermanii (Rav.) Zahlbr.; Placidium tuckermanii (Ravenel ex Mont.) Breuss 725. 2.
* Skorepa et al. (1977) – Allegany Co., base of White Oak. 3.
* Skorepa et al. (1979) – on bark. 726. 4.
* E.G. Worthley Herbarium - Allegany Co., Green Ridge State Forest, on base of White Oak. 727.
* Placidium lachneum (Ach.) Breuss [Verrucariaceae] 1.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight. 728.
* Placynthiella uliginosa (Schrader) Coppins & P. James [Agyriaceae] 729. 1.
* Syn.: Lecidea uliginosa (Schrad.) Ach. 2.
* Skorepa et al. (1977) – Dorchester Co., on oak trunk. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 5.
* Lendemer & Knapp (2007) - (2. Idylwild) 730.
* Placynthium nigrum (Hudson) Gray [Placynthiaceae] 731. 1.
* Skorepa et al. (1977) – Garrett Co., on block of cement. 2.
* Skorepa et al. (1979) – on calcareous rock, cement. 732. 3.
* E.G. Worthley Herbarium - Baltimore Co., St. Thomas Church Cemetery, on rock wall. 733.
* Platismatia tuckermanii (Oakes) Culb. & C. Culb. [Parmeliaceae] 1.
* Skorepa et al. (1977) – Garrett Co., on sandstone boulder. 734. 2.
* Skorepa et al. (1979) – on bark, acidic rock, wood 735.
* Polysporina simplex (Davies) Vezda [Acarosporaceae] 736. 1.
* Syn.: Sarcogyne simplex (Davies) Nyl. 2.
* Skorepa et al. (1979) – on acidic rock. 737. 3.
* E.G. Worthley Herbarium - Howard Co., on rock outcrop. 738.
* Porina cestrensis (Tuck. ex Michener) Müll. Arg. [Trichotheliaceae] 1.
* Skorepa et al. (1979) – on bark. 739.
* Porina heterospora (Fink ex J. Hedrick) R.C. Harris [Trichotheliaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 740.
* Porpidia albocaerulescens (Wulfen) Hertel & Knoph [Porpidiaceae] 741. 1.
* Syn.: Lecanora albocaerulescens (Wulf.) Ach. 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 3.
* Skorepa et al. (1979) – on acidic rock. 742. 4.
* E.G. Worthley Herbarium - Baltimore Co., near small bridge, on Wissahickon schist; Frederick Co.; Garrett Co., on rocks along Big Run. 743. 5.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on sandstone boulder. 744.
* Porpidia crustulata? (Ach.) Hertel & Knoph [Porpidiaceae] 1.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 745.
* Porpidia macrocarpa (DC.) Hertel & A. J. Schwab [Porpidiaceae] 746. 1.
* Syn.: Lecidea macrocarpa (DC.) Steud. 747. 2.
* Skorepa et al. (1977) – Garrett Co., on sandstone. 3.
* Skorepa et al. (1979) – on acidic rock. 748.
* Protoblastenia rupestris (Scop.) J. Steiner [Psoraceae] 1.
* Skorepa et al. (1979) – on calcareous rock, cement. 749.
* Pseudevernia consocians (Vainio) Hale & Culb. [Parmeliaceae] 750. 1.
* Syn.: Parmelia furfuracea (L.) Ach. 751. 2.
* Skorepa et al. (1977) – Garrett Co., on upper branches of Hemlock. 3.
* Skorepa et al. (1979) – on bark. 4.
* E.G. Worthley Herbarium - Baltimore Co., Owings Mills. 752.
* Pseudosagedia cestrensis (Tuck. ex E. Michener) R.C. Harris [Porinaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild) 753.
* Pseudosagedia raphidosperma (Müll. Arg.) R.C. Harris [Porinaceae] 1.
* Lendemer & Knapp (2007) - (4. Sharptown) 754.
* Psora decipiens (Hedwig) Hoffm. [Psoraceae] 755. 1.
* Syn.: Lecidea decipiens (Hedwig) Ach. 2.
* Skorepa et al. (1979) – on soil. 756.
* Psora russellii (Tuck.) A. Schneider [Psoraceae] 757. 1.
* Syn.: Lecidea russellii Tuck. 758. 2.
* Skorepa et al. (1977) – Frederick Co., on conglomerate boulders. 3.
* Skorepa et al. (1979) – on calcareous rock. 759.
* Psorotichia schaereri (A. Massal.) Arnold [Lichinaceae] 1.
* Skorepa et al. (1979) – on cement. 760.
* Psorula rufonigra (Tuck.) Gotth. Schneider [Psoraceae] 761. 1.
* Syn.: Lecidea rufonigra (Tuck.) Nyl. 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 3.
* Skorepa et al. (1979) – on acidic rock. 762.
* Punctelia appalachensis (Culb.) Krog [Parmeliaceae] 763. 1.
* Syn.: Parmelia appalachensis Culb. 2.
* Skorepa et al. (1979) – on bark. 764.
* Punctelia bolliana (Müll. Arg.) Krog [Parmeliaceae] 765. 1.
* Syn.: Parmelia bolliana Müll. Arg. 2.
* Skorepa et al. (1979) – on bark. 766.
* Punctelia borreri (Sm.) Krog [Parmeliaceae] 767. 1.
* Syn.: Parmelia borreri (Sm.) Turner 2.
* Skorepa et al. (1979) – on bark. 768.
* Punctelia missouriensis G. Wilh. & Ladd 1.
* Lendemer & Knapp (2007) - (2. Idylwild) 769.
* Punctelia perreticulata (Räsänen) G. Wilh. & Ladd [Parmeliacae] 770. 1.
* Syns.: Punctelia subrudecta (Nyl.) Krog, Parmelia subrudecta Nyl. 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 4.
* Biechele (2002) – lower eastern shore of Maryland. 771. 5.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Owings Mills, on bark. 772. 6.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight; Baltimore Co., on bark of Norway Maple. 7.
* Lendemer & Knapp (2007) - (4. Sharptown) 773.
* Punctelia rudecta (Ach.) Krog [Parmeliaceae] 774. 1.
* Syn.: Parmelia rudecta Ach. 775. 2.
* Skorepa et al. (1977) – Caroline Co., on trunks of trees. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 4.
* Biechele (2002) – lower eastern shore of Maryland. 776. 5.
* 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. 777. 6.
* E.C. Uebel Herbarium – Prince George's Co., on dead limb; Carroll Co., Liberty Reservoir, on bark. 7.
* Lendemer & Knapp (2007) - (1. Millington), (5. Hickory Pt.), (6. Pocomoke) 778.
* Pycnothelia papillaria Dufour [Cladoniaceae] 779. 1.
* Skorepa et al. (1977) – Prince George's Co., along dirt road. 2.
* Skorepa et al. (1979) – on soil. 3.
* Biechele (2002) – lower eastern shore of Maryland. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 780.
* Pyrenula pseudobufonia (Rehm) R.C. Harris [Pyrenulaceae] 781. 1.
* Syn.: Pyrenula neglecta R.C. Harris 2.
* Skorepa et al. (1979) – on bark. 3.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.) 782.
* Pyrenula punctella Trevis. [Pyrenulaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 783.
* Pyrenula subelliptica (Tuck.) R.C. Harris [Pyrenulaceae] 784. 1.
* Syn.: Pyrenula imperfecta (Ellis & Everh.) R.C. Harris 2.
* Skorepa et al. (1979) – on bark. 785.
* Pyrrhospora varians (Ach.) R.C. Harris [Lecanoraceae] 786. 1.
* Syn.: Lecidea varians Ach. 787. 2.
* Skorepa et al. (1977) – Worcester Co., on twigs of Myrica. 3.
* Skorepa et al. (1979) – on bark. 4.
* Lendemer & Knapp (2007) - (2. Idylwild), (5. Hickory Pt.), (6. Pocomoke) 788.
* Pyxine caesiopruinosa (Tuck.) Imshaug [Physciaceae] 789. 1.
* Skorepa et al. (1977) – Howard Co., on tree. 2.
* Skorepa et al. (1979) – on bark. 790. 3.
* E.G. Worthley Herbarium - Baltimore Co., on bark of Juglans nigra; Carroll Co., on bark of Juglans nigra. 791.
* Pyxine sorediata (Ach.) Mont. [Physciaceae] 1.
* Skorepa et al. (1977) – Garrett Co., on oak. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 792. 4.
* E.G. Worthley Herbarium – Frederick Co.; Baltimore Co., growing on a sterile crust, Pertusaria? 793. 5.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on tree root; Ridge Road, on bark Norway Maple. 6.
* Lendemer & Knapp (2007) - (1. Millington), (2. Idylwild), (4. Sharptown) 794.
* Pyxine subcinerea Stirton [Physciaceae] 795. 1.
* E.C. Uebel Herbarium – Prince George's Co., on oak bark; Baltimore Co., on maple bark. 796.
* Ramalina americana? Hale [Ramalinaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. 797.
* Ramalina fastigiata (Pers.) Ach. [Ramalinaceae] 798. 1.
* Skorepa et al. (1977) – Worcester Co., on branches of deciduous trees. 2.
* Skorepa et al. (1979) – on bark. 799.
* Ramalina willeyi R. Howe [Ramalinaceae] 1.
* Skorepa et al. (1977) – Worcester Co., on branches of deciduous trees. 2.
* Biechele (2002) – lower eastern shore of Maryland. 800.
* Ramonia microspora Vězda [Gyalectaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild) 801.
* Rhizocarpon concentricum (Davies) Beltr. [Rhizocarpaceae] 802. 1.
* E.G. Worthley Herbarium - Garrett Co., Swallow Falls State Forest, on sandstone. 803.
* Rhizocarpon eupetraeum (Nyl.) Arnold [Rhizocarpaceae] 804. 1.
* Syn.: Rhizocarpon intermedium Degel. 2.
* Skorepa et al. (1979) – on acidic rock. 805.
* Rhizocarpon geographicum (L.) DC. [Rhizocarpaceae] 1.
* Skorepa et al. (1979) – on acidic rock. 806.
* Rhizocarpon obscuratum (Ach.) A. Massal. [Rhizocarpaceae] 807. 1.
* Skorepa et al. (1977) – Baltimore Co., on rock outcrop. 2.
* Skorepa et al. (1979) – on acidic rock. 808.
* Rhizoplaca chrysoleuca (Sm.) Zopf [Lecanoraceae] 809. 1.
* Syn.: Lecanora rubina (Vill.) Ach.; Lecanora chrysoleuca (Sm.) Ach. 2.
* Skorepa et al. (1977) – Montgomery Co., on rock ledges. 3.
* Skorepa et al. (1979) – on acidic rock. 810. 4.
* E.G. Worthley Herbarium - Frederick Co., Mt. Catoctin Park; Montgomery Co., Great Falls, on rocks. 811.
* Rimelia subisidiosa (Müll. Arg.) Hale & Fletcher [Parmeliaceae] 812. 1.
* Syn.: Parmelia subisidiosa (Müll. Arg.) C.W. Dodge 2.
* Skorepa et al. (1979) – on bark. 813.
* Rinodina applanata H. Magn. [Physciaceae] 1.
* Skorepa et al. (1979) – on bark. 814.
* Rinodina ascociscana Tuck. [Physciaceae] 1.
* Skorepa et al. (1979) – on bark. 815.
* Rinodina exigua (Ach.) Gray [Physciaceae] 1.
* Skorepa et al. (1979) – on bark. 816.
* Rinodina ochrocea Willey ex Fink [Physciaceae] 1.
* Skorepa et al. (1979) – on acidic rock. 817.
* Rinodina oxydata (A. Massal.) A. Massal. [Physciaceae] 1.
* Skorepa et al. (1979) – on acidic rock. 818.
* Rinodina papillata H. Magn. [Physciaceae] 1.
* Skorepa et al. (1979) – on bark. 819.
* Rinodina subminutaH. Magn. [Physciaceae] 1.
* Skorepa et al. (1979) – on bark. 820.
* Sarcogyne clavus (DC.) Kremp. [Acarosporaceae] 1.
* Skorepa et al. (1979) – on acidic rock. 821.
* Sarcogyne regularis Körber [Acarosporaceae] 1.
* Skorepa et al. (1979) – on calcareous rock. 822. 2.
* E.C. Uebel Herbarium – Prince George's Co., Greenbelt, on hill of concrete. 823.
* Sarcosagium campestre (Fr.) Poetsch & Schiedem. [Acarosporaceae] 824. 1.
* Syn.: Biatorella campestris (Fr.) Almq. 2.
* Skorepa et al. (1979) – on soil. 825.
* Schismatomma glaucescens (Nyl. ex Willey) R.C. Harris [Roccellaceae] 1.
* Lendemer & Knapp (2007) - (4. Sharptown) 826.
* Scoliciosporum chlorococcum (Stenh.) Vezda [Lecanoraceae] 827. 1.
* Syn.: Bacidia chlorococca (Graeve ex Stizenb.) Lett. 2.
* Skorepa et al. (1977) – Montgomery Co., on oak. 3.
* Skorepa et al. (1979) – on bark. 4.
* E.G. Worthley Herbarium - Worcester Co., Milburn Landing. 828. 5.
* E.C. Uebel Herbarium – Baltimore Co., Liberty Reservoir, on bark of Acer rubrum. 6.
* Lendemer & Knapp (2007) - (2. Idylwild) 829.
* Scoliciosporum umbrinum (Ach.) Arnold [Lecanoraceae] 830. 1.
* Syn.: Bacidia umbrina (Ach.) Bausch 831. 2.
* Skorepa et al. (1977) – Garrett Co., on aspens. 832. 3.
* Skorepa et al. (1979) – on acid rock. 833.
* Sphinctrina turbinata (Pers ex Fr.) de Not. [Sphinctrinaceae] 834. 1.
* E.C. Uebel Herbarium – Carroll Co., Liberty Reservoir, on Aspicilia caesiocinerea. 835.
* Sticta fuliginosa (Hoffm.) Ach. [Lobariaceae] 836. 1.
* E.G. Worthley Herbarium - Frederick Co., along Appalachian Trail, on soil. 837.
* Teloschistes chrysophthalmus (L.) Th. Fr. [Teloschistaceae] 1.
* Skorepa et al. (1979) – on bark. 838.
* Tephromela atra (Huds.) Hafellner [Bacidiaceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 839.
* Thelidium minutulum Körber [Verrucariaceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.) 840.
* Thelotrema monospermum R.C. Harris [Thelotremataceae] 1.
* Lendemer & Knapp (2007) - (6. Pocomoke) 841.
* Thelotrema subtile Tuck. [Thelotremataceae] 1.
* Lendemer & Knapp (2007) - (5. Hickory Pt.), (6. Pocomoke) 842.
* Trapelia coarctata (Sm.) M. Choisy [Agyriaceae] 843. 1.
* Syn.: Lecidea coarctata (Sm.) Nyl. 2.
* Skorepa et al. (1979) – on acidic rock. 844.
* Trapeliopsis flexuosa (Fr.) Coppins & P. James [Agyriaceae] 845. 1.
* Syn.: Lecidea aeruginosa Borrer 846. 2.
* Skorepa et al. (1977) – Harford Co., on fence post. 3.
* Skorepa et al. (1979) – on wood. 847. 4.
* E.C. Uebel Herbarium – Prince George's Co., NE Branch of Anacostia River Bike Trail, on weathered fence rail. 5.
* Lendemer & Knapp (2007) - (2. Idylwild), (3. Chesapeake) 848.
* Trapeliopsis granulosa (Hoffm.) Lumbsch [Agyriaceae] 849. 1.
* Syn.: Lecidea granulosa (Hoffm.) Ach. 2.
* Skorepa et al. (1979) – on soil. 850. 3.
* E.G. Worthley Herbarium - Montgomery Co., Great Falls, on timber. 851.
* Trypethelium virens Tuck. ex Michener [Trypetheliaceae] 1.
* Skorepa et al. (1979) – on bark. 852. 2.
* E.G. Worthley Herbarium - Calvert Co., on bark. 853. 3.
* Lendemer & Knapp (2007) - (4. Sharptown), (5. Hickory Pt.) 854.
* Tuckermanella fendleri (Nyl.) Essl. [Parmeliaceae] 855. 1.
* Syn.: Cetraria fendleri (Nyl.) Tuck.; Tuckermannopsis fendleri (Nyl.) Hale 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 3.
* Skorepa et al. (1979) – on bark. 4.
* Biechele (2002) – lower eastern shore of Maryland. 856. 5.
* E.G. Worthley Herbarium - Wicomico Co., Wicomico State Park; on Loblolly Pine; Worcester Co., Milburn Landing, on bark of Loblolly Pines. 857.
* Tuckermannopsis americana (Sprengel) Hale [Parmeliaceae] 1.
* Lendemer & Knapp (2007) - (4. Sharptown) 858.
* Tuckermannopsis ciliaris (Ach.) Gyelnik [Parmeliaceae] 859. 1.
* Syn.: Cetraria ciliaris Ach. 2.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 3.
* Skorepa et al. (1979) – on bark. 860. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Wicomico Co., on bark. 861.
* Umbilicaria mammulata (Ach.) Tuck. [Umbilicariaceae] 862. 1.
* Syn.: Gyrophora dillenii (Tuck.) Müll. 2.
* Skorepa et al. (1977) – Garrett Co., on conglomerate. 3.
* Skorepa et al. (1979) – on bark, acidic rock. 863. 4.
* E.G. Worthley Herbarium - Baltimore Co., Loch Raven, on rock outcrop; Frederick Co., South Mt., on boulders; Montgomery Co., Sugarloaf Mt., on boulders. 864.
* Umbilicaria muehlenbergii (Ach.) Tuck. [Umbilicariaceae] 865. 1.
* Skorepa et al. (1977) – Allegany Co., on rock outcrop. 2.
* Skorepa et al. (1979) – on acidic rock. 866.
* Umbilicaria vellea (L.) Hoffm. [Umbilicariaceae] 867. 1.
* Skorepa et al. (1977) – No locality. (collected by Plitt 1912) 2.
* Skorepa et al. (1979) – on acidic rock. 868.
* Usnea filipendula Stirton [Parmeliaceae] 869. 1.
* Syn.: Usnea dasypoga (Ach.) Rohl. 870. 2.
* Skorepa et al. (1977) – Garrett Co., (collected by Smith). 3.
* Skorepa et al. (1979) – on bark. 871.
* Usnea mutabilis Stirton [Parmeliaceae] 872. 1.
* Skorepa et al. (1977) – Worcester Co., on pines. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 873. 4.
* E.G. Worthley Herbarium - Worcester Co., Pocomoke State Park, on Taxodium distichum. 874.
* Usnea pensylvanica Motyka [Parmeliaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (6. Pocomoke) 875.
* Usnea strigosa (Ach.) Eaton [Parmeliaceae] 1.
* Skorepa et al. (1977) – Worcester Co., on deciduous trees. 2.
* Biechele (2002) – lower eastern shore of Maryland. 876. 3.
* E.G. Worthley Herbarium – Worcester Co.; Calvert Co, Battle Creek Cypress Swamp; St. Mary's Co.; Wicomico Co. 4.
* E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. 5.
* Lendemer & Knapp (2007) - (6. Pocomoke) 877.
* Usnea strigosa subsp. rubiginea (Michaux) I. Tav. [Parmeliaceae] 878. 1.
* Syn.: Usnea rubiginea (Michx.) Massal. 2.
* Skorepa et al. (1977) – Worcester Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark. 879.
* Usnea subscabrosa Nyl. ex Motyka [Parmeliaceae] 1.
* Lendemer & Knapp (2007) - (2. Idylwild), (4. Sharptown), (5. Hickory Pt.), (6. Pocomoke) 880.
* Usnea trichodea Ach. [Parmeliaceae] 881. 1.
* Skorepa et al. (1977) – Worcester Co., on tops of Cypress trees. 2.
* Skorepa et al. (1979) – on bark. 3.
* Biechele (2002) – lower eastern shore of Maryland. 4.
* Lendemer & Knapp (2007) - (6. Pocomoke) 882.
* Verrucaria calciseda DC. [Verrucariaceae] 1.
* Skorepa et al. (1979) – on calcareous rock. 883.
* Verrucaria fuscella (Turner) Winch [Verrucariaceae] 1.
* Skorepa et al. (1979) – on calcareous rock. 884.
* Verrucaria glaucovirens Grummann [Verrucariaceae] 885. 1.
* Syn.: Verrucaria virens Nyl. 2.
* Skorepa et al. (1979) – on calcareous rock. 886.
* Verrucaria muralis Ach. [Verrucariaceae] 1.
* Skorepa et al. (1979) – on calcareous rock. 887.
* Verrucaria nigrescens Pers. [Verrucariaceae] 1.
* Skorepa et al. (1977) – Lichens of Soldiers Delight. 2.
* Skorepa et al. (1979) – on calcareous rock. 888.
* Verrucaria pinguicula A. Massal. [Verrucariaceae] 1.
* Skorepa et al. (1979) – on calcareous rock. 889.
* Xanthomendoza fallax (Hepp) Søchting, Kärnefelt & S. Kondr. [Teloschistaceae] 890. 1.
* Syn.: Xanthoria fallax (Hepp) Arn. 2.
* Skorepa et al. (1977) – Worcester Co., on deciduous trees. 3.
* Skorepa et al. (1979) – on bark, cement. 4.
* Biechele (2002) – lower eastern shore of Maryland. 891.
* Xanthomendoza fulva (Hoffm.) Søchting, Kärnefelt & S. Kondr. [Teloschistaceae] 892. 1.
* Syn.: Xanthoria fulva (Hoffm.) Poelt & Petutschnig 2.
* E.C. Uebel Herbarium – Baltimore Co., Ridge Rd., on bark of Norway Maple. 893.
* Xanthoparmelia angustiphylla (Gyelnik) Hale [Parmeliaceae] 894. 1.
* Syn.: Parmelia hypopsila Müll. Arg. = Xanthoparmelia hypopsila, but N.A. records are Xanthoparmelia angustiphylla. 2.
* Skorepa et al. (1977) – Baltimore Co., on rock outcrop. 3.
* Skorepa et al. (1979) – on acidic rock. 895.
* Xanthoparmelia conspersa (Ehrh. ex Ach.) Hale [Parmeliaceae] 896. 1.
* Syn.: Parmelia conspersa (Ach.) Ach. 897. 2.
* Skorepa et al. (1977) – Garrett Co., on rock outcrop. 3.
* Skorepa et al. (1979) – on acidic rock. 898. 4.
* E.G. Worthley Herbarium - Lichens of Soldiers Delight; Baltimore Co., Gunpowder River, on rock outcrops; Frederick Co. 899.
* Xanthoparmelia cumberlandia (Gyelnik) Hale [Parmeliaceae] 900. 1.
* Syn.: Parmelia cumberlandia (Gyelnik) Hale 2.
* Skorepa et al. (1977) – Baltimore Co., on rocks on hillside. 3.
* Skorepa et al. (1979) – on acidic rock. 901.
* Xanthoparmelia plittii (Gyelnk) Hale [Parmeliaceae] 902. 1.
* Syn.: Parmelia plittii Gyelnik 903. 2.
* Skorepa et al. (1977) – Washington Co., on rock outcrops. 3.
* Skorepa et al. (1979) – on acidic rock. 4.
* E.C. Uebel Herbarium – Lichens of Soldiers Delight. 904.
* Xanthoparmelia subramigera (Gyelnik) Hale [Parmeliaceae] 905. 1.
* E.C. Uebel Herbarium – Prince George's Co., Berwyn Heights, on roof shingles (identified by Dr. Richard C. Harris). 906.
* Xanthoparmelia tasmanica (Hook. f. & Taylor) Hale [Parmeliaceae] 907. 1.
* Syn.: Parmelia tasmanica Hook. f. & Taylor 2.
* Skorepa et al. (1979) – on acidic rock. 908.
* Xanthoparmelia viriduloumbrina (Gyelnik) Lendemer [Parmeliaceae] 909. 1.
* Syn: Parmelia taractica Kremplh. = Xanthoparmelia taractica (Kremp.) Hale – known from Mexico, but misidentifications for our area; specimens in eastern N.A. are X. viriduloumbrina. 910. 2.
* Skorepa et al. (1977) (Parmelia taractica) – Baltimore Co., on serpentine rocks. 911. 3.
* Skorepa et al. (1979) (Parmelia taractica) – on acidic rock. 912. 4.
* 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. 913.
* Xanthoria parietina? (L.) Th. Fr. [Teloschistaceae] 1.
* Biechele (2002) – lower eastern shore of Maryland. (en)
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