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T. H. Nash_, III, Ryan, B. D., Gries, C., Bungartz, F.2001Lichen Flora of the Greater Sonoran Desert Region
P. L. Nimis1993The Lichens of Italy: An annotated catalogue
A. Nordin2002Collemopsidium angermannicum, a widespread but rarely collected aquatic lichen
W. Nylander1879Addenda nova ad Lichenographiam Europaeam
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M. A. G. Otálora, Aragón, G., Mart{\'ınez, I., Molina, M. C.2004A new corticolous species of Leptogium (Collemataceae) from Spain
M. A. G. Otálora, Lutzoni, F. {\cc}ois, Mart{\'ınez, I., M. Molina, C., Aragón, G.2008Phylogenic relationships and taxonomy of the Leptogium lichenoides group (Collemataceae, Ascomycota) in Europe
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K. Palmqvist2000Tansley Review No. 117 Carbon Economy in Lichens
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Y. Sil Park1990The Macrolichen Flora of South Korea
J. A. N. Parnell, Cronk, Q., P. Jackson, W., Strahm, W.1989A Study of the Ecological History, Vegetation and Conservation Management of Ile aux Aigrettes, Mauritius
P. Paulsrud, Rikkinen, J., Lindbald, P.2000Spatial Patterns of Photobiont Diversity in Some Nostoc-Containing Lichens
P. Paulsrud, Rikkinen, J., Lindbald, P.1998Cyanobiont Specificity in Some Nostoc-Containing Lichens and in a Peltigera aphthosa Photosymbiodeme
G. Paz-Bermúdez, M de Silanes, E. López, Carballal, R.2005The lichen genera Collemopsidium Nyl. and Verrucaria Schrader from the Galician seashores (NW Spain)
J. L. E. Peck, Grabner, J., Ladd, D., Larson, D. R.2004Microhabitat affinities of Missouri Ozarks Lichens
I. Pereira2007Micobiota liquenizada del Parque Katalapi, X Region, Chile. Lichenized fungi of Parque Katalapi, X Region, Chile
B. D. Piercy-Normore, Goxson, B., Goward, T., Goffinet, B.2006Phylogenic position of a Pacific Northwest North American endemic cyanolichen, Nephroma occultum (Ascomycota, Peltigerales)
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J. Rikkinen, Oksanen, I., Lohtander, K.2002Lichen Guilds Share Related Cyanobacterial Symbionts
P. A. Roskin1970Ultrastructure of the Host-Parasite Interaction in the Basidiolichen Cora pavonia (Web.) E. Fries.
R. Santesson1993The lichens and lichenicolous fungi of Sweden and Norway
R. Santesson1992Pyrenocollema elegans, a new marine lichen
R. Santesson1984The Lichens of Sweden and Norway
R. Santesson1952Foliicolous lichens I. A revision of the taxonomy of the obligately foliicolous, lichenized fungi
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I. Schmitt, H. Lumbsch, T., Sochting, U.2003Phylogeny of the Lichen Genus Placopsis and Its Allies Based on Bayesian Analyses of Nuclear and Mitochondrial Sequences
B. Schroeter1994In Situ Photosynthetic Differentiation of the Green Algal and the Cyanobacterial Photobiont in the Crustose Lichen Placopsis contortuplicata
M. Schultz2008 Metamelanea umbonata New to the British Isles
M. Schultz2007On the identity of Anema dodgei, Psorotichia segregata and psorotichia squamulosa, three misunderstood cyanolichens from the southwestern United States
M. Schultz2005Heppia arenacea and Lempholemma polycarpum, two new species from Southern Yemen and Socotra
M. Schultz2005An Overview of Lichinella in the Southwestern United States and Northwestern Mexico, and the New Species Lichinella granulosa
M. Schultz2003The saxicolous and terricolous, cyanobacterial lichens of Socotra (Yemen, Indian Ocean)
M. Schultz1998Studies on Lichens from southern Yemen (Arabian Peninsula)
M. Schultz, Büdel B.2005Phloeopeccania anemoides, a New Lichen Species from Baja California Sur and Sinaloa, Mexico
M. Schultz, Büdel B.2003On the systematic position of the lichen genus Heppia
M. Schultz, Büdel B.2002Key to the genera of the Lichinaceae
M. Schultz, Büdel, B., Porembski, S.2001Thyrea porphyrella, a new species of the Lichinaceae from inselbergs in tropical South America
M. Schultz, Porembski, S., Büdel, B.2000Diversity of Rock-Inhabiting Cyanobacterial Lichens: Studies on Granite Inselbergs along the Orinoco and in Guyana
M. Schultz, van den Boom P. P. G.2007Notes on cyanobacterial lichens (mostly Lichinales, Ascomycota) of the Canary Islands


Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith