Fungi Outer Hebrides


Family: Rhizocarpaceae

Rhizocarpon richardii (Lamy ex Nyl.) Zahlbr.

Type: Crustose

Brown to greyish-brown, areolate-cracked thallus, often with a fimbriate blackish-brown prothallus. Inset flattish, black apothecia with thin margins. Very common on siliceous coastal rocks forming mosaics.

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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