@article{WoltersBittmannKummer2005,
  author    = {Wolters, Steffen and Bittmann, Felix and Kummer, Volker},
  title     = {The first subfossil records of Urtica kioviensis Rogow. and their consequences for palaeoecological interpretations},
  year      = {2005},
  abstract  = {Among plant remains from Mesolithic layers dating from 9249 to 7779 B.C. at the excavation site of Friesack IV in north-eastern Germany, nutlets of Urtica kioviensis were identified. Morphological studies have shown that they clearly differed from all other European Urtica species investigated. In contrast, pollen morphological investigations revealed only slight differences between the central European Urtica species, which could hardly have been noticed during routine or normal pollen analyses. The records of U. kioviensis nutlets are the first subfossil finds reported and prove the indigenous status of this taxon in north-eastern Germany. The records are discussed in the context of the overall species spectrum of the Mesolithic layers and consequences for the interpretation of pollen analytical studies concerning human impact are pointed out},
  language  = {en}
}
@article{ThinesKummer2013,
  author    = {Thines, Marco and Kummer, Volker},
  title     = {Diversity and species boundaries in floricolous downy mildews},
  series = {Mycological progress : international journal of the German Mycological Society},
  volume    = {12},
  journal   = {Mycological progress : international journal of the German Mycological Society},
  number    = {2},
  publisher = {Springer},
  address   = {Heidelberg},
  issn      = {1617-416X},
  doi       = {10.1007/s11557-012-0837-7},
  pages     = {321 -- 329},
  year      = {2013},
  abstract  = {Floricolous downy mildews are a monophyletic group of members of the genus Peronospora (Oomycota, Peronosporales). These downy mildews can be found on a variety of families of the Asteridae, including Asteraceae, Campanulaceae, Dipsacaceae, Lamiaceae, and Orobanchaceae. With the exception of Peronospora radii, which can also cause economically relevant losses, sporulation usually takes place only on floral parts of their hosts. However, only very few specimens of these mostly inconspicuous downy mildews have so far been included in molecular phylogenies. Focusing on Lamiaceae, we have investigated multiple specimens of floricolous downy mildews for elucidating species boundaries and host specificity in this group. Based on both mitochondrial and nuclear loci, it became apparent that phylogenetic lineages in the Lamiaceae seem to be host genus specific and significant sequence diversity could be found between lineages. Based on distinctiveness in both phylogenetic reconstructions and morphology, the downy mildew on flowers of Stachys palustris is introduced as a new species, Peronospora jagei sp. nov., which can be morphologically distinguished from Peronospora stigmaticola by broader and shorter conidiospores. The diversity of the floricolous down mildews might be higher than previously assumed, although specimens from a much broader set of samples will be needed to confirm this view.},
  language  = {en}
}
@article{ScherberEisenhauerWeisseretal.2010,
  author    = {Scherber, Christoph and Eisenhauer, Nico and Weisser, Wolfgang W. and Schmid, Bernhard and Voigt, Winfried and Fischer, Markus and Schukze, Ernst-Detlef and Roscher, Christiane and Weigelt, Alexandra and Allan, Eric and Beßler, Holger and Bonkowski, Michael and Buchmann, Nina and Buscot, Fran{\c{c}}ois and Clement, Lars W. and Ebeling, Anne and Engels, Christof and Halle, Stefan and Kertscher, Ilona and Klein, Alexandra Maria and Koller, Robert and K{\"o}nig, Stephan and Kowalski, Esther and Kummer, Volker and Kuu, Annely and Lange, Markus and Lauterbach, Dirk},
  title     = {Bottom-up effects of plant diversity on multitrophic interactions in a biodiversity experiment},
  issn      = {0028-0836},
  year      = {2010},
  language  = {en}
}
@article{RaetzelKummerOtteetal.2002,
  author    = {R{\"a}tzel, Stefan and Kummer, Volker and Otte, Volker and Sipman, Harri J. M},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg VII},
  year      = {2002},
  language  = {de}
}
@article{RottstockKummerFischeretal.2017,
  author    = {Rottstock, Tanja and Kummer, Volker and Fischer, Markus and Joshi, Jasmin Radha},
  title     = {Rapid transgenerational effects in Knautia arvensis in response to plant community diversity},
  series = {The journal of ecology},
  volume    = {105},
  journal   = {The journal of ecology},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0022-0477},
  doi       = {10.1111/1365-2745.12689},
  pages     = {714 -- 725},
  year      = {2017},
  abstract  = {1. Plant species persistence in natural communities requires coping with biotic and abiotic challenges. These challenges also depend on plant community composition and diversity. Over time, biodiversity effects have been shown to be strengthened via increasing species complementarity in mixtures. Little is known, however, whether differences in community diversity and composition induce rapid transgenerational phenotypic adaptive differentiation during community assembly. We expect altered plant-plant and other biotic interactions (mutualists or antagonists) in high vs. low diverse communities to affect immediate within-and between-species trait differentiations due to competition for light and nutrients. 2. Three years after the initiation of a large-scale, long-term biodiversity experiment in Jena, Germany, we tested for effects of varying experimental plant community diversity (1-60 plant species; one to four plant functional groups) and composition (with or without legumes and/or grasses) on phenotypic differentiation and variation of the tall herb Knautia arvensis. We measured reproduction at different diversity levels in the Jena Experiment (residents hereafter) and, in an additional common garden experiment without competition, recorded subsequent offspring performance (i.e. growth, reproductive success and susceptibility to powdery mildew) to test for differentiation in phenotypic expression and variability. 3. We observed phenotypic differences among diversity levels with reduced fecundity of K. arvensis residents in more diverse communities. In the next generation grown under common garden conditions, offspring from high-diversity plots showed reduced growth (i.e. height) and lower reproduction (i.e. fewer infructescences), but increased phenotypic trait variability (e.g. in leaf width and powdery mildew presence) and also tended to be less susceptible to powdery mildew infection. 4. Community composition also affected Knautia parents and offspring. In the presence of legumes, resident plants produced more seeds (increased fecundity); however, germination rate of those seeds was reduced at an early seedling stage (reduced fertility). 5. Synthesis. We conclude that rapid transgenerational effects of community diversity and composition on both mean and variation of phenotypic traits among offspring exist. In addition to heritable variation, environmentally induced epigenetic and/or maternal processes matter for early plant community assembly and may also determine future species coexistence and community stability.},
  language  = {en}
}
@article{RottstockJoshiKummeretal.2014,
  author    = {Rottstock, Tanja and Joshi, Jasmin Radha and Kummer, Volker and Fischer, Markus},
  title     = {Higher plant diversity promotes higher diversity of fungal pathogens, while it decreases pathogen infection per plant},
  series = {Ecology : a publication of the Ecological Society of America},
  volume    = {95},
  journal   = {Ecology : a publication of the Ecological Society of America},
  number    = {7},
  publisher = {Wiley},
  address   = {Washington},
  issn      = {0012-9658},
  pages     = {1907 -- 1917},
  year      = {2014},
  abstract  = {Fungal plant pathogens are common in natural communities where they affect plant physiology, plant survival, and biomass production. Conversely, pathogen transmission and infection may be regulated by plant community characteristics such as plant species diversity and functional composition that favor pathogen diversity through increases in host diversity while simultaneously reducing pathogen infection via increased variability in host density and spatial heterogeneity. Therefore, a comprehensive understanding of multi-host multi-pathogen interactions is of high significance in the context of biodiversity-ecosystem functioning. We investigated the relationship between plant diversity and aboveground obligate parasitic fungal pathogen ("pathogens" hereafter) diversity and infection in grasslands of a long-term, large-scale, biodiversity experiment with varying plant species (1-60 species) and plant functional group diversity (1-4 groups). To estimate pathogen infection of the plant communities, we visually assessed pathogen-group presence (i.e., rusts, powdery mildews, downy mildews, smuts, and leaf-spot diseases) and overall infection levels (combining incidence and severity of each pathogen group) in 82 experimental plots on all aboveground organs of all plant species per plot during four surveys in 2006. Pathogen diversity, assessed as the cumulative number of pathogen groups on all plant species per plot, increased log-linearly with plant species diversity. However, pathogen incidence and severity, and hence overall infection, decreased with increasing plant species diversity. In addition, co-infection of plant individuals by two or more pathogen groups was less likely with increasing plant community diversity. We conclude that plant community diversity promotes pathogen-community diversity while at the same time reducing pathogen infection levels of plant individuals.},
  language  = {en}
}
@article{RistowHerrmannIlligetal.2006,
  author    = {Ristow, Michael and Herrmann, Andreas and Illig, Hubert and Klemm, Gunther and Kummer, Volker and Kl{\"a}ge, Hans-Christian and Machatzi, Bernd and Raetzel, Stefan and Schwarz, R. and Zimmermann, Friedrich},
  title     = {Liste und Rote Liste der etablierten Gef{\"a}ßpflanzen Brandenburgs},
  year      = {2006},
  language  = {de}
}
@article{RaetzelKummer2010,
  author    = {Raetzel, Stefan and Kummer, Volker},
  title     = {Die Erforschung der in Brandenburg vorkommenden Kryptogamen nach 1945 (Moose, Pilze)},
  year      = {2010},
  language  = {de}
}
@article{OtteRaetzelSipmanetal.2000,
  author    = {Otte, Volker and R{\"a}tzel, Stefan and Sipman, Harri J. M. and Kummer, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg V},
  year      = {2000},
  language  = {de}
}
@article{OtteRaetzelKummeretal.2001,
  author    = {Otte, Volker and R{\"a}tzel, Stefan and Kummer, Volker and De Bruyn, Uwe},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg VI},
  year      = {2001},
  language  = {de}
}
@article{OtteRaetzelKummer1997,
  author    = {Otte, Volker and R{\"a}tzel, Stefan and Kummer, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg III},
  year      = {1997},
  language  = {de}
}
@book{KuehlingKummer1999,
  author    = {K{\"u}hling, Matthias and Kummer, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg IV},
  year      = {1999},
  language  = {de}
}
@article{KuehlingKummer1999,
  author    = {K{\"u}hling, Matthias and Kummer, Volker},
  title     = {Im Land der Araukarier},
  year      = {1999},
  language  = {de}
}
@article{KuehlingBorkKummer2000,
  author    = {K{\"u}hling, Matthias and Bork, Hans-Rudolf and Kummer, Volker},
  title     = {Die W{\"u}ste Atacama},
  year      = {2000},
  language  = {de}
}
@article{KoernerSeitzJentschetal.2002,
  author    = {K{\"o}rner, Sabine and Seitz, Birgit and Jentsch, Helmut and Kummer, Volker},
  title     = {Der Spreewald : Lebensraum f{\"u}r gef{\"a}hrdete Pflanzenarten},
  year      = {2002},
  language  = {de}
}
@article{KummerRichterSchwik2005,
  author    = {Kummer, Volker and Richter, Torsten and Schwik, J{\"u}rgen},
  title     = {Wegelina grumsiniana comb. nov. (Ascomycetes, Calosphaeriales) : ein Pyrenomycet auf der Porenschicht faulender Zunderschw{\"a}mme (Fomes fomentarius)},
  year      = {2005},
  language  = {de}
}
@article{KummerMiersch2001,
  author    = {Kummer, Volker and Miersch, J{\"u}rgen},
  title     = {Bericht {\"u}ber eine einw{\"o}chige mykologische Exkursion nach Gotland im Herbst 1999},
  year      = {2001},
  language  = {de}
}
@article{KummerLuschkaOtto2005,
  author    = {Kummer, Volker and Luschka, Norbert and Otto, Peter},
  title     = {Aufruf f{\"u}r neue Serien zur Kartierung der Pilze Ostdeutschlands},
  year      = {2005},
  language  = {de}
}
@article{KummerLehnhardtKlopfer1992,
  author    = {Kummer, Volker and Lehnhardt, Lothar and Klopfer, Klaus},
  title     = {Untersuchungen zur Fremdbesatzproblematik bei 5 Gerstensorten mittels {\"A}hrennachkommenschaftspr{\"u}fung und Hordeinelektrophorese},
  year      = {1992},
  language  = {de}
}
@article{KummerKuemmerlingRaetzeletal.1995,
  author    = {Kummer, Volker and K{\"u}mmerling, Heidi and R{\"a}tzel, Stefan and Otte, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg : eine Anregung zur floristischen Arbeit},
  year      = {1995},
  language  = {de}
}
@article{KummerKlopfer1992,
  author    = {Kummer, Volker and Klopfer, Klaus},
  title     = {Untersuchungen zur morphologischen Differenzierung von 5 nahe verwandten Sommergerstensorten},
  year      = {1992},
  language  = {de}
}
@article{KummerJentsch1997,
  author    = {Kummer, Volker and Jentsch, Helmut},
  title     = {Elodea nuttallii (PLANCH.), St, Johan nun auch in Brandenburg},
  year      = {1997},
  language  = {de}
}
@article{KummerJentsch2001,
  author    = {Kummer, Volker and Jentsch, Helmut},
  title     = {Korrekturen und Nachtr{\"a}ge als Vorarbeit zu einer Flora des Spreewaldes},
  year      = {2001},
  language  = {de}
}
@article{KummerJage2003,
  author    = {Kummer, Volker and Jage, Horst},
  title     = {Bemerkenswerte Pilzfunde auf der 33. Brandenburgischen Botanikertagung in Perleberg},
  year      = {2003},
  language  = {de}
}
@article{KummerHaneltHaneltetal.2010,
  author    = {Kummer, Volker and Hanelt, Dorothea and Hanelt, Peter and Jage, Horst and John, Heino and Richter, Heidrun and Richter, Udo and Schultz, Burkhard},
  title     = {Phyllactinia hippopha{\"e}s (Erysiphales) rediscovered in Germany},
  issn      = {1641-8180},
  year      = {2010},
  abstract  = {The Erysiphales species Phyllactinia hippopha{\"e}s Thuem. ex S. Blumer was found for the fi rst time on cultivated Sea Buckthorn (Hippopha{\"e} rhamnoides L.) near Großkayna (Saxony-Anhalt) in October 2009. This fungus was considered to be extinct in Germany. Intensive searching in Saxony-Anhalt and the Potsdam area (Brandenburg) yielded many additional records, most of them from former brown coal mining areas or in Sea Buckthorn plantations.},
  language  = {en}
}
@article{KummerBurkart1995,
  author    = {Kummer, Volker and Burkart, Michael},
  title     = {Scolochloa festucacea (WILLD.) LINK in der Unteren Havelniederung Sachsen-Anhalts},
  year      = {1995},
  language  = {de}
}
@article{KummerBurkart1997,
  author    = {Kummer, Volker and Burkart, Michael},
  title     = {Die Flora der Stromtalwiesen an der unteren Havel und andere botanische Besonderheiten},
  year      = {1997},
  language  = {de}
}
@article{KummerBuhr2006,
  author    = {Kummer, Volker and Buhr, Christoph},
  title     = {Beitrag zur Flora des Potsdamer Stadtgebietes II},
  year      = {2006},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 2. Moorflanzen ; Teil 1},
  year      = {2007},
  language  = {de}
}
@article{Kummer2006,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 09.10.05 in der Umgebung der F{\"o}rsterei Rochau},
  year      = {2006},
  language  = {de}
}
@article{Kummer2006,
  author    = {Kummer, Volker},
  title     = {Der L{\"u}bbener Rudolf Marloth (1855-1931) als Botaniker in S{\"u}dafrika - eine Lebensskizze},
  year      = {2006},
  language  = {de}
}
@article{Kummer2006,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 36. Brandenburgischen Botanikertagung in Hohenspringe/Flaeming},
  year      = {2006},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 37. Brandenburgischen Botanikertagung in Neuendorf bei Oranienburg},
  issn      = {0945-4292},
  year      = {2007},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 10.10.2004 im Bereich des Drehnaer Weinberges},
  year      = {2005},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 35. Brandenburgischen Botanikertagung in Storkow},
  year      = {2005},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Zusammenstellung lokaler Pilzliteratur 2000 - 2003},
  year      = {2005},
  language  = {de}
}
@article{Kummer2005,
  author    = {Kummer, Volker},
  title     = {Ein Vorkommen von Draba muralis L. im Potsdamer Stadtgebiet},
  year      = {2005},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Vom Seidenbau in Krausnick},
  year      = {2004},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Dr. Dieter Benkert zum 70. Geburtstag},
  issn      = {0724-3111 -},
  year      = {2004},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 34. Brandenburgischen Botanikertagung in Ortrand},
  issn      = {0724-3111 -},
  year      = {2004},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 05.10.02 bei Prierow},
  year      = {2004},
  language  = {de}
}
@article{Kummer2004,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : II. Die Myxo- und Makromyceten (Ascomycetes, Basidiomycetes) im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald) ; Teil 2},
  year      = {2004},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 06.10.02 bei St{\"o}britz-Willmersdorf sowie {\"o}stlich von Egsdorf},
  year      = {2003},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : II. Die Myxo- und Makromyceten (Ascomycetes, Basidiomycetes) im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald) ; Teil 1},
  year      = {2003},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 1. Wasserpflanzen ; Teil 2},
  year      = {2003},
  language  = {de}
}
@article{Kummer2003,
  author    = {Kummer, Volker},
  title     = {Beitrag zur Flora des Potsdamer Stadtgebietes},
  issn      = {0724-3111 -},
  year      = {2003},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Farbenfroh und verg{\"a}nglich},
  year      = {1997},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Eine botanische Wanderung rund um den Neuendorfer See},
  year      = {1997},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Der Große Burgwall bei Havelberg : ein bemerkenswerter Pilzstandort},
  year      = {1997},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Kommt Plagiothecium undulatum (HEDW) B.S.G. noch in der Niederlausitz vor?},
  year      = {1997},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Ein Beitrag zur Pilzflora des G{\"o}rlsdorfer Waldes},
  year      = {1997},
  language  = {de}
}
@article{Kummer1997,
  author    = {Kummer, Volker},
  title     = {Einige interessante Neub{\"u}rger der Potsdamer Umgebung},
  year      = {1997},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Zur Pilzflora des Kienbergs bei Wolsier mit Hinweisen auf die Phanerogamenflora},
  year      = {1996},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Zum Vorkommen von Asplenium viride HUDS : in Berlin und Brandenburg},
  year      = {1996},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Exkursionsbericht "Neuendorfer Se/Unterspreewald" am 31.08.1996},
  year      = {1996},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Die Exkursion zum Gollwitzer Havelufer},
  year      = {1996},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : I. Bemerkenswerte und seltene Funde aus dem Unterspreewaldgebiet},
  year      = {1996},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Der Abriß der Neuen Sch{\"a}nke},
  year      = {1996},
  language  = {de}
}
@article{Kummer1996,
  author    = {Kummer, Volker},
  title     = {Zur Wasserpflanzenvegetation des Neuendorfer Sees},
  year      = {1996},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde aus dem nordwestlichen Unterspreewald-Randgebiet},
  year      = {1994},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {Botanische Exkursion ins Wolfsbruch bei Alt T{\"o}plitz},
  year      = {1994},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {B{\"u}rgert sich Gypsophila perfoliata in Brandenburg ein?},
  year      = {1994},
  language  = {de}
}
@article{Kummer1994,
  author    = {Kummer, Volker},
  title     = {Notizen {\"u}ber einige Adventivpflanzenfunde auf dem Krausnicker M{\"u}llplatz},
  year      = {1994},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {Einige Aspekte der Pilzflora im Bol'soj Thac-Gebiet (NW-Kaukasus)},
  year      = {2007},
  abstract  = {Some aspects of the fungal flora in the Bol'{\"U}oj Tha; area (NW-Caucasus) - During an excursion to the Bol'soj Tha; area in north-western Caucasus in the late summer of 1998 a number of mycological observations were made. 111 macrofungi species (30 ascomycetes, 81 basidiomycetes), 16 myxomycetes and 42 phytoparasitic fungi (15 Erysiphales, 27 Uredinales) were registered. The majority of the recorded macromycetes were decomposers of dead stems and logs of different trees and shrubs, especially of the dominating tree species Fagus orientalis and Abies nordmanniana. Bondarzewia montana, Hericium alpestre and Phellinus hartigii are typical colonisers of old Abies trunks and therefore of special interest. They were recorded several times, especially in the primeval forests of the excursion area. Some of the collected taxa like Daldinia petriniae, Hypoxylon cercidicola, H. liviae, Ophiostoma polyporicola, Pezoloma marchantiae, Ramsbottomia macracantha, Symphyosyria angelicae, Auriporia aurulenta, Flagelloscypha pilatii, Hymenochaete carpatica, Marasmius cf. rhododendrorum and Pellidiscus pallidus are discussed in detail. Some of the recorded taxa are probably new for the western Caucasus and in some cases also for Russia.},
  language  = {de}
}
@article{Kummer2007,
  author    = {Kummer, Volker},
  title     = {List of fungi (ascomycetes, basidiomycetes, myxomycetes and phytoparasitic fungi) recorded in the Bol'soj Thac area between the so called "Devils gate" (Acesbok) and the village Novoprohladnoe},
  year      = {2007},
  abstract  = {The list contains all the identified fungi collections of the excursion in 1998. In it were also included some records published by OTTO (2001) and few unpublished data of fungi mainly collected by V. Otte after 1998. Unless other information is given, all the fungal collections and their determination were done by the author. Most of the collections are integrated as exsiccata in the herbarium of the author.},
  language  = {en}
}
@article{Kummer2008,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 07.10.07 in der Calauer Schweiz bei Cabel},
  year      = {2008},
  language  = {de}
}
@article{Kummer2008,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 2. Moorflanzen ; Teil 2},
  year      = {2008},
  language  = {de}
}
@article{Kummer2009,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Ergebnisse der Pilzexkursion am 12.10.08 im Kasel- Reichwalder Busch bei Reichwalde},
  issn      = {1432-4199},
  year      = {2009},
  language  = {de}
}
@article{Kummer1995,
  author    = {Kummer, Volker},
  title     = {Die Salzbunge (Samolus valerandi) im Bornimer Schlangenbruch wieder gefunden},
  year      = {1995},
  language  = {de}
}
@article{Kummer1995,
  author    = {Kummer, Volker},
  title     = {Usnea filipendula : ein bemerkenswerter Flechtenfund bei Krausnick},
  year      = {1995},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Notizen zu einem Vorkommen des Roten Waldv{\"o}geleins bei Falkensee},
  year      = {1993},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Zum Vorkommen des Sternst{\"a}ublings (Mycenastrum corium) in der Niederlausitz},
  year      = {1993},
  language  = {de}
}
@book{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Notizen zur Pflanzenwelt des NSG "Alter Nuthelauf"},
  year      = {1993},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Die Krausnicker Schule zu Beginn des 19. Jahrhunderts : ein Beitrag zur Gechichte des Unterspreewaldortes},
  year      = {1993},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Vielstengeliges Sumpfried (Eleocharis multicaulis) am Luchsee gefunden},
  year      = {1993},
  language  = {de}
}
@article{Kummer1993,
  author    = {Kummer, Volker},
  title     = {Notizen {\"u}ber den Amtsgarten zu Krausnick},
  year      = {1993},
  language  = {de}
}
@article{Kummer2010,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf der 38. Brandenburgischen Botanikertagung in Groß Pinnow/Uckermark},
  issn      = {9454-4292},
  year      = {2010},
  language  = {de}
}
@article{Kummer2010,
  author    = {Kummer, Volker},
  title     = {Zusammenstellung lokaler Pilzliteratur 2004 - 2008},
  issn      = {0232-4598},
  year      = {2010},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Zum Vorkommen im Cetraria islandica (.L) ACH., dem isl{\"a}ndischen Moos, und Cetraria ericetorium OPIZ in Brandenburg unter besonderer Ber{\"u}cksichtigung der Niederlausitz},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Flora und Vegetation im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald)},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Auf der Suche nach der "Blauen Blume"},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Loweomyces fractipes im Unterspreewald gefunden},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Beobachtungen zu Pithya cupressina andchloroscypha alutipes},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 03.10.97 zum Nordufer des Sandteiches bei F{\"u}rstlich Drehna},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Ein kurzer Einblick in die Vielfalt unserer heimischen Pilze},
  year      = {1998},
  language  = {de}
}
@article{Kummer1998,
  author    = {Kummer, Volker},
  title     = {Neue Erkenntnisse {\"u}ber den Ursprung der Krausnicker Kirche und ihre Einordnung in die damalige Kirchenbauentwicklung},
  year      = {1998},
  language  = {de}
}
@book{Kummer1992,
  author    = {Kummer, Volker},
  title     = {Historie der Krausnicker Kirche},
  publisher = {Fata-Morgana-Verl.},
  address   = {Berlin},
  pages     = {28 S.},
  year      = {1992},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pilzfunde auf den Tagungen des Botanischen Vereins in Linowsee und Finowfurth},
  year      = {2002},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 07.10.01 im Gebiet des ehem. Tagebaus Schlabendorf-Nord},
  year      = {2002},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Rutstroemia fruticeti und Velutarina rufoolivacea : zwei wenig beachtete Besiedler abgestorbener Rubus fruticosus-Ruten},
  issn      = {0014-8962},
  year      = {2002},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Literaturhinweis},
  year      = {2002},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Bemerkenswerte Pflanzenarten des Spreewaldes : 1. Wasserpflanzen ; Teil 1},
  year      = {2002},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Cochlearia danica nun auch in Brandenburg},
  year      = {2002},
  language  = {de}
}
@article{Kummer2002,
  author    = {Kummer, Volker},
  title     = {Ein Vorkommen von Glyceria striata im Springbruch bei Potsdam},
  year      = {2002},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 07.10.00 im Gebiet des Tiergartens s{\"u}dlich Weißack},
  year      = {2001},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Exkursionsbericht "Exkursion zum S{\"u}dufer des Dolgener Sees und zum Schwarzen Luch bei Groß Leuthen" am 05.08.2000},
  year      = {2001},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Korrekturen und Erg{\"a}nzungen zur Pilzflora des Unteren Haveltales.-},
  year      = {2001},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora des Spreewaldes : III. Die phytoparasitischen Pilze im Bereich des Neuendorfer Sees (Biosph{\"a}renreservat Spreewald)},
  year      = {2001},
  language  = {de}
}
@article{Kummer2001,
  author    = {Kummer, Volker},
  title     = {Vor 125 Jahren tagte der Botanische Verein der Provinz Brandenburg in L{\"u}bben},
  year      = {2001},
  language  = {de}
}
@article{Kummer2000,
  author    = {Kummer, Volker},
  title     = {Beitr{\"a}ge zur Pilzflora der Luckauer Umgebung : die Makromyceten der Pilzexkursion am 10.10.99 im Krossener Busch},
  year      = {2000},
  language  = {de}
}