Collema nigrescens

Collema nigrescens
	in Northwestern California
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Peltigerales
Family:	Collemataceae
Genus:	Collema
Species:	C. nigrescens
Binomial name
	Collema nigrescens; (Huds.) DC. (1805)
Synonyms
	Lichen nigrescens Huds. (1762);

Collema nigrescens is a leafy (foliose) jelly lichen (Collema genus) found growing on the bark of trees such as bigleaf maples, in wetter coastal parts of California.^[1]^: 34, 36 It is commonly called button jelly lichen or bat's wing lichen.^[1]^: 34, 36 It is blackish-green when wet, and dark brownish-green to dark olive when dry.^[1]^: 34, 36 The photosynthetic partner is the Nostoc cyanobacterium that is spread throughout the thallus (main body part).^[1]^: 34, 36 Although foliose in form, like all jelly lichens, the thallus is not differentiated, lacking layers or an upper or lower cortex (lichen) and the cyanobacteria is spread throughout the thallus.^[1]^: 34, 36 It has dark purple-brown apothecia all over.^[1]^: 34, 36 It produces no reaction to lichen spot tests.^[1]^: 34, 36

References

^ ^a ^b ^c ^d ^e ^f ^g Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2

This Peltigerales-related article is a stub. You can help Wikipedia by expanding it.

[SSFGCL-1] ^ ^a ^b ^c ^d ^e ^f ^g Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ISBN 978-0-300-19500-2

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