#usnochroma

Usnochroma

Genus of lichens

Usnochroma is a genus of lichen-forming fungi in the family Teloschistaceae. It has two species of crustose lichens. The genus was circumscribed in 2013 by lichenologists Ulrik Søchting, Ulf Arup, and Patrik Frödén, with Usnochroma carphineum assigned as the type species. The genus name refers to the yellowish-green colour of the thallus, which is caused by the substance usnic acid. Usnochroma species occur in Macaronesia, South Africa, the Mediterranean Basin, and Algeria.

Sat 6th

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