BLAM e. V.

Bryological and Lichenological Association for Central Europe

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BLAM was founded about 50 years ago to facilitate contact between people working in any field of lichenology or bryology in Central Europe. Today, BLAM is a registered association with 320 members, EU-European and abroad, professionals and amateurs. BLAM is a registered association ("e. V."), No. VR 555 Dü (Vereinsregister Bad Dürkheim).


Bryophyte and Lichen of the Year 2023

Urban heat island & climate change adaptation: mosses and lichens in green roofs: Tortella inclinata and Cladonia rangiformis are bryophyte and lichen of the year 2023 (text in German).

Cladonia rangiformis, Windsheimer Bucht, Franken [W. v. Brackel]After the temporal development of scientific findings was used as the selection criterion for Moss and Lichen of the Year last year, it is once again an ecological topic in 2023. This time, the focus is on the use of mosses and lichens in green roofs, which can be used to mitigate the overheating of cities in summer - keyword "urban heat island" - as well as the load on sewage systems during short heavy rain events. The one by cooling through water evaporation and the plant turf also acting as an additional thermal insulation, the other by absorbing and retaining rainwater and at best delaying runoff. These benefits of green roofs (but also green facades) are important for making our cities more resilient to the consequences of climate change. With Tortella inclinata and Cladonia rangiformis (photo), two species were selected that occur naturally in strongly drying biotopes such as semi-arid grasslands and also spontaneously colonize green roofs. 

Look here for recent species of the year:

2008: Orthotrichum pulchellum und Letharia vulpina
2009: Leucobryum glaucum und Cladonia rangiferina
2010: Polytrichum commune und Dibaeis baeomyces
2011: Thuidium abietinum und Fulgensia fulgens
2012: Buxbaumia viridis und Lobaria pulmonaria
2013: Marchantia polymorpha und Peltigera didactyla
2014: Hedwigia ciliata und Rhizocarpon geographicum
2015: Schistostega pennata und Psilolechia lucida
2016: Sphagnum magellanicum und Icmadophila ericetorum
2017: Ctenidium molluscum und Variospora flavescens
2018: Bartramia pomiformis und Umbilicaria cylindrica
2019: Cryphaea heteromalla und Parmotrema perlatum
2020: Ptilidium pulcherrimum und Cladonia digitata
2021: Rhytidiadelphus squarrosus and Lecanora muralis and Lecanora muralis
2022: Enchylium tenax and Diobelonella palustris


Becoming a member

Membership is open to anyone, professional and amateur. Members receive the society's journal HERZOGIA and have the possibilty to join excursions (mainly to the Alps, Tatra, etc).
If you wish to join please contact the to the treasurer Dr. Martin Nebel, Wellingstraße 14, 70619 Stuttgart, Germany.

Annual subscription is 30 € (students and seniors 20 €).


Our society bulletin is been named Herzogiella

The first volume was published recently and mailed to all members. Editorial board: Stefan Kaufmann & Dietmar Teuber. Please mail manuscripts (excursion reports, species lists, comments on books, small papers dealing with lichens and/or bryophytes, notes on events etc.) to Dietmar Teuber before January 2023.


Purchasing publications

HERZOGIA (current or back issues) can be purchased by sending an E-mail to the treasurer Dr. Martin Nebel, Wellingstraße 14, 70619 Stuttgart, Germany.


Our bank account details

Name beneficient: BryolLichenolArbeitsgem
Place beneficient: Bad Duerkheim Country beneficient: Germany
SWIFT/BIC: MALADE51DKH IBAN: DE49 5465 1240 0000 5793 00
Name of the bank: Sparkasse Rhein-Haardt


BLAM-Mailinglist blam-web

This is a mailinglist open for people interested in bryology and lichenology. Language is mainly German or English. For subscription, go to "blam-web"-Website (at University of Graz, Austria; English version available) and fill the form. You will be sent an email requesting confirmation. Once confirmation is received, your request will be held for approval by the list moderator. You will be notified of the moderator's decision by email. The list of members is not available to non-members.



Herzogia (ISSN 0018-0971) is the international journal of the Bryological and Lichenological Association for Central Europe (BLAM) and publishes original research papers and short communications in German and English. It focuses on the systematics, taxonomy, biogeography and ecoltogy of bryophytes and lichens with predominantly European distribution, or on species which are of general interest to members of BLAM. Herzogia is published in 2 parts per volume and year. » abstracts and papers of vol 16 to 22. Recent volumes are accessible via BioOne (free access for BLAM-members).

Herzogia - Editorial board

Senior editors

Dr. Volker OtteDr. Frank Müller



Dr. Christian Berg, Graz
Prof. Dr. Harald Kürschner, Berlin
Dr. Martin Nebel, Stuttgart
Dr. Klaus Stetzka, Tharandt


Dr. Wolfgang v. Brackel, Röttenbach
Dr. Gintaras Kantvilas, Hobart
Prof. Dr. Matthias Schultz, Hamburg
Dr. Toby Spribille, Graz
Dr. Holger Thüs, Stuttgart
Dr. Silke Werth, Graz

Author instructions - in German and English (PDF)

Submission of manuscripts

Volker Otte, Senckenberg Museum für Naturkunde Görlitz, PF 300 154, 02806 Görlitz, Deutschland
Phone +49 3581 47605311 
Fax +49 3581 47605101


BLAM Officers

President: Christian Printzen
Senckenberg Research Institute and Natural History Museum Frankfurt, Department of Botany and Molecular Evolutionary Research/Herbarium Senckenbergianum (FR) - Section Cryptogams - Senckenberganlage 25, D-60325 Frankfurt am Main (D)

Vice President: Christian Berg
Karl-Franzens-University Graz - Institute of Plant Sciences / Botanical Garden
Holteigasse 6, 8010 Graz, Austria

Traesurer: Martin Nebel
Wellingstraße 14, 70619 Stuttgart, Germany

Secretary & Webmaster: Martina Pöltl
Study Center Natural History (Bryology) - Weinzöttlstraße 16, 8045 Graz, Austria

Senior Editor of HERZOGIA: Volker Otte
Senckenberg Museum of Natural History Görlitz, PF 300 154, 02806 Görlitz, Germany

Society Bulletin Editor: Dietmar Teuber

Team Homepage & Social Media: Martina Pöltl (respons.), Wolfgang von Brackel (Species of the Year), Sonja Thielen, Rasmus Kray & Norbert J. Stapper

Nature Conservation Officer: Jürgen Wächter
Schwarzbachtal 25a, 33824 Werther (Westphalia), Germany


Ecological indicator values of 516 Central European lichen species

Citation: Wirth, V. (2010): Ökologische Zeigerwerte von Flechten. - Herzogia 23 (2): 229-248