Observation 305563: Calicium glaucellum Ach.

Code: Bot_322/2009_DSC6375

Habitat: Mixed mountain forest, Picea abies and Fagus sylvatica dominant trees; bottom of an Alpine valley, locally almost flat terrain; alluvial, calcareous ground; partly protected from direct rain by tree canopies; average precipitations ~ 3.000 mm/year, average temperature 4-6 deg C, elevations 1.040 m (3.400 feet), alpine phytogeographical region.

Substratum: decorticated, still standing truck of a dead Picea abies.

Place: Zadnja Trenta valley, Zapodn place, left bank of (dry) river Soča, near a small torrent-dam; East Julian Alps, Posočje, Slovenia EC.

Comment: Pictures most probably show species Calicium glaucellum. Size of the shiny black, stalked apothecia, obovoid to weakly bell-shaped apothecia, very thin, almost invisible grayish thallus, absence of pruina, the ratio of sporocarp height to stalk diameter (AVG=11.6, SD=2.4, N=15) and substratum speak in favor of Calicium glaucellum. Quite some time I was unable to decide between Calicium abietinum and Calicium glaucellum. Sporocarps seem to have too thin stalks compared to their height for Calicium abietinum. Also no pruina was seen. Finally, I found out that Index Fungorum considers both names as synonyms in spite of the fact that most of my literature considers both names as separate species. Obviously they must be quite variable. Microscopy data would make this determination much more reliable.

According to Ref.4, 5 and 7 the species has been found in Slovenia several times, also in the East Julian Alps (Ref.7).

Nikon D70 / Nikkor Micro 105mm/f2.8

Species Lists


Proposed Names

61% (2)
Recognized by sight: Black, shiny, less than 1 mm tall apothecia with thin stalks, on decorticated wood and almost invisible thallus.
Used references: (1) F.S. Dobson, Lichens, The Richmonds Publishing Ca.LTD (2005), p 91.
(2) C.W.Smith, et all, The lichens of Great Britain and Ireland, The British Lichen Society, (2009), p 243.
(3) V. Wirth, Die Flechten Baden-Württembergs, Teil.1., Ulmer (1995), p 204.
(4) Prügger et all. ‘Alphabetical list of lichenized fungi for the six phytogeographical regions of Slovenia’, http://members.chello.at/johannes.pruegger/uni/slovenia/ (accessed 9.1.2018)
(5) Boletus Informaticus Database, Forestry Institute of Slovenia http://www.zdravgozd.si/bi_index.aspx (accessed 9.1.2018)
(6) http://www.waysofenlichenment.net/lichens/Calicium/ (accessed 9.1.2018)
(7) F. Batič, K. Primožič, B. Surina, T. Trošt & H. Mayzhofer, Contributions to the lichen flora of Slovenia X. – Contributions to the lichen flora from the Slovenian Julian Alps, Herzogia 16, (2003): 143–154

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