P exasperata de Not.: Crombie.
p. glabratula (Lamy) Nyl.: Paulson & Thompson.
p, perlata (Huds.) Ach. (*): On bark of cut base of Fagus. Bellringer's Hollow (1 specimen 12 mm diam); on Salix, Ching Brook
south-west of Whitehall Plain, 1990, M.W. Hanson: on S. fragilis, Baldwins Pond (3 specimens. largest 30 mm diam); on Salix, Wintry
Wood (1 specimen 25 mm diam).
p, revoluta Florke (*): On bark of cut base of Fagus. Bellringer's Hollow, a single specimen 8 mm diam.
P saxatilis (L.) Ach.: Rose.
P. subaurifera Nyl. (*): On bark of a wide range of trees but mainly in sheltered situations and most frequent on Salix; the largest
specimens found were at Baldwins Pond (26 mm diam) and Wintry Wood (25 mm diam).
P subrudecta Nyl.: Paulson & Thompson. Records of P. borreri (Sm.) Turner are tenatatively referred here.
P. sulcata Taylor: On bark and wood, frequent but generally as young thalli less than 20 mm diam, older ones being restricted to Salix in
sheltered sites. The largest found were in Wintry Wood (to 53 mm diam).
Peltigera lactucifolia (With.) Laundon: Crombie. Records of P. polydactyla (Necker) Hoffm, most probably referred to this species.
P membranacea (Ach.) Nyl.: Paulson & Thompson. Records of P. canina (L.) Willd, are presumed to belong here.
Pertusaria albescens (Huds.) M. Choisy & Werner: Crombie.
P amara (Ach.) Nyl.: Paulson & Thompson.
P flavida (DC.) Laundon: Crombie.
P hymenea (Ach.) Schaerer: Rose.
P. leioplaca DC: Rose.
P pertusa (Weigel) Tuck.: Rose.
Phaeographis dendritica (Ach.) Mull. Arg.: Crombie
P. inusta (Ach.) Mull. Arg.: Crombie
Phaeophyscia orbicularis (Necker) Mobcrg (*): On bark, especially of Salix, in sheltered situations, locally frequent.
Phlyctis agelaea (Ach.) Flotow: Crombie.
P. argena (Sprengel) Flotow: Crombie.
Physcia adscendens (Fr.) H. Olivier (*); On Salix in sheltered situations, occasional but less frequent than P. tenella.
P. caesia (Hoffm.) Furnrohr: Paulson & Thompson.
P. clementei (Sm.) Maas Geest,: Crombie.
P. semipinnata (Gmelin) Moberg: Forster
P. tenella (Scop.) DC. (*): On Salix in sheltered situations, occasional.
Physconia distorta (With.) Laundon: Paulson & Thompson.
P. grisea (Lam.) Poelt: Crombie.
Placynthiella icmalea (Ach.) Coppins & P.James: On bark and wood, sometimes forming extensive sheets, common. Earlier reports of
Lecidea uliginosa (Schrader) Ach. are presumed to belong here.
Platismatia glauca (L) Culb. & C.Culb. (*): Unlocalized, 1980s. Seaward; on base of a single Quercus, one specimen 80 mm diam.
Wintry Wood.
Pyrenula chlorospila Arnold: Rose.
P. macrospora Degel.: Crombie.
Pyrrhospora quernea (Dickson) Korber: Rose.
Ramalina calicaris (L.) Fr.: Crombie.
R. canariensis Steiner: Crombie. Records of R. pollinaria (Westr.) Ach. are tentatively referred here.
R. farinacea (L.)Ach. (*): On Ulmus log, Wanstead Park, 1985, Plant (specimens to 8 mm tall; conf. Skinner); on Salix in sheltered
situations, rare. Baldwins Pond (1 specimen 8 mm tall).
R. fastigiata (Pers.) Ach.: Crombie.
R. fraxinea (L.) Ach.: Crombie
Rinodina exigua (Ach.) Gray: Crombie.
R. roboris (Duf. ex Nyl.) Arnold: Crombie.
Schismatomma decolorans (Turner & Borrer ex Sm.) Clauz. & Vezda: Rose. A single depauperate specimen on Quercus on Stump Road in
Wintry Wood (1MI 348258) could have been this species.
Scoliciosporum chloroccocum (Graewe ex Stenhammar) Vezda (*): On bases of old Quercus trees, Warren Pond.
Strangospora moriformis (Ach.) B. Stein: Crombie.
Thelotrema lepadinum (Ach.) Ach.: Paulson & Thompson.
Trapeliopsis flexuosa (Fr.) Coppins & P. James (*): On bark, especially tree bases, wood, and stumps, common.
T. gelatinosa (Florke) Coppins & P. James: Unlocalized, 1980s, Seaward; below Fagus. Great Monk Wood, 1983, Skinner (STD), det. P.W.
James.
T. granulosa (Hoffm.) Lumbsch: On bark and wood, especially, near the ground, occasional and much scarcer than T flexuosa.
T. pseudogranulosa Coppins & P. James (*): On stony clay spreading onto basal roots of Fagus, Dulsmead Hollow.
Usnea cornuta Korber: Forster.
U. glabrata (Ach.) Vainio: Forster.
U. hirta (L.) Wigg.: Paulson & Thompson. Probably a misidentification.
U. subfloridana Stirton (*): On a fallen Quercus branch on the ground, near The Ching below Warren Pond (a single specimen 6 mm tall);
on Salix, Connaught Water (a single specimen 8 mm tall).
Xanthoria candelaria (L.) Th.Fr.: Paulson & Thompson.
X. parietina (L.) Th.Fr, (*): On dead Fagus stump. Dulsmead Hollow, a single specimen 5 mm diam. Paulson & Thompson's (1911) record
of X. calcicola Oxner from Fagus is tenatatively referred here.
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