Aspicilia cyanescens

Aspicilia cyanescens
	Aspicilia cyanescens parasitized by the small fungus Lichenostigma elongatum
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Ascomycetes
Order:	Pertusariales
Family:	Megasporaceae
Genus:	Aspicilia
Species:	A. cyanescens
Binomial name
	Aspicilia cyanescens; Owe-Larss. & A. Nordin

Aspicilia cyanescens (bluish sunken disk lichen) is a rough surfaced, bluish-tinged pale gray rimose to areolate crustose lichen, endemic to California.[1]^:226[2] It mostly grows on rock.[1]^:226 It is unique among California members of its genus in that it can sometimes be found on growing on bark or wood, especially incense cedar and sometimes on white fir or giant sequoias in the central Sierra Nevada range and southern California mountains.[1]^:226 It has a black or bluish or greenish prothallus.[1]^:226 The prothallus is usually absent when growing on rock.[1]^:226 Each areole commonly has 1-7 roundish to angular apothecia that are .1 - 1.3 mm in diameter.[2] Apothecia have black to blue-black, concave to flat discs, without pruina.[2] Lichen spot tests are all negative.[1]^:226

References

Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2
Aspicilia cyanescens,Lichen Flora of the Greater Sonoran Desert Region. Vol 3, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001,

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[SSFGCL-1] Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2

[LFGSDR-2] Aspicilia cyanescens,Lichen Flora of the Greater Sonoran Desert Region. Vol 3, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.) 2001,