Candelariella vitellina

Candelariella vitellina is a common and widespread green-yellow to orange-yellow crustose areolate lichen that grows on rock, wood, and bark, all over the world.[1] It grows on non-calcareous rock, wood, and bark.[1] It often has tiny lobate areoles in the shape of lion claws.[1] The areoles may be flat or convex.[1] Its sexual reproduction structures (apothecia) are a 0.35–1.0 mm-wide disc, darker yellow than the thallus, rimmed with thallus-like tissue lecanorine, flat but becoming convex with age.[1] Lichen spot tests are K+ reddish, KC-, and C-.[1] It produces calycin, pulvinic acid, pulvinic dilactone and vulpinic acid as secondary metabolites.[1]

Candelariella vitellina
Candelariella vitellina on granite,
magnification 30x
Scientific classification
Kingdom:
Fungi
Division:
Ascomycota
Class:
Lecanoromycetes
Order:
Candelariales
Family:
Candelariaceae
Genus:
Candelariella
Species:
C. vitellina
Binomial name
Candelariella vitellina
(Ehrh.) Müll.Arg. (1894)
Synonyms
  • Lichen vitellinus Ehrh. (1785)
  • Patellaria vitellina Hoffm. (1794)

In California, it prefers growing on granite, but can also be found on wood (rarely on bark) and other kinds of rock.[2]:251

Candelariella vitellina looks like a miniature version of C. rosulans.[1] It can be distinguished by C. vitanela having a visible exciple (the rim around the apothecia disc), which C. rosulans does not have.[1] It is usually much larger and thicker than the similar C. lutella.[1]

References
  1. Lichen Flora of the Greater Sonoran Desert Region. Vol 2, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001,
  2. Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2
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