Cladonia glauca Flörke

Cladonia glauca forms unbranched to slightly branched, thin, grey to brownish podetia with pointy apices. The podetium bases are slightly squamulose. The squamules get less abundant upwards and the surface becomes granulose to sorediate. A longitudinal crack on the podetium is often formed. The species contains squamatic acid (UV+ bluish white) but a chemotype with thamnolic acid (K+ yellow-orange) is also known from Western Europe. Without verification of the secondary metabolite content, it might be confused with the common species C. rei and C. subulata, or even C. macilenta.

The lichen typically grows on acidic soil near rock outcrops, on sandbanks, peatbogs, heathlands, screes and in pine forests. It also occurs on peat, humus and decaying wood. C. glauca generally prefers natural to relic stand types. Its distribution range in Europe is sub-atlantic. In the Czech Republic, most of its localities lie in the western part, where it is scattered.

Literature: Malíček J., Bouda F., Kocourková J., Palice Z. & Peksa O. (2011): Zajímavé nálezy vzácných a přehlížených dutohlávek v České republice. – Bryonora 48: 34–50.

taxonomic classification:

Ascomycota Lecanoromycetes Lecanorales Cladoniaceae Cladonia

Red List (Liška & Palice 2010):VU – vulnerable

Occurrence in the Czech Republic

All records: 166, confirmed 131. One click on a selected square displays particular record(s), including their source(s).


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Altitude preferences

Distribution Timeline

Substrate type

Substrate preferences

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