Lecidea laboriosa

Lecidea laboriosa is a species of lichen that grows inside solid rock (endolithic), with only the small black disc-like fruiting bodies (apothecia) visible above the rock surface.[2]:301[3] Unlike other members of the genus Lecidea, the apothecia are not lecideine in that they either lack black margins (exciples) or have gray vertically striated margins.[2]:301 It grows all over the world in all climates.[3] It might be the most common endolithic lichen in California.[2]:301

Lecidea laboriosa
Lecidea laboriosa on granite
Scientific classification
Kingdom:
Fungi
Division:
Ascomycota
Class:
Lecanoromycetes
Order:
incertae sedis
Family:
Lecideaceae
Genus:
Lecidea
Species:
L. laboriosa
Binomial name
Lecidea laboriosa

It is similar in appearance to Catillaria lenticularis, Polyspora simplex, and Sarcogyne clavus.[2]:301

It is negative to lichen spot tests, K-, P-, C-.[2]:301[3]

References
  1. Müller J. (1874). "Lichenologische Beiträge. I" (in German). 57: 185–92 (see p. 187). Cite journal requires |journal= (help)
  2. Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2
  3. Lichen Flora of the Greater Sonoran Desert Region. Vol 2, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001,


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