Fungi Outer Hebrides


Family: Rocellaceae

Opegrapha atra Pers.

Type: Crustose

Widespread but easily confused with other graphid lichens. Thallus creamy but can look quite green with algae present. Crowded lirellate apothecia

Determiner: 
Chris Johnson

References: 
Smith et al. editors (2009) The Lichens of Great Britain and Ireland
Dobson (2018) Lichens: an Illustrated Guide to the British and Irish Species

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