Fungi Outer Hebrides


Family: Lecideaceae

Porpidia macrocarpa (DC.) Hertel & A. J. Schwab

Type: Crustose

An extremely variable species. Thallus may be immersed to thin and continuous, or occasionally thicker and areolate. Usually pale greenish-grey but reddish when oxidised. Prothallus is indistinct when thallus immersed, but black and visible when superficial. Large black apothecia (to 3 mm), shiny or matt with persistent margins.Frequent in upland areas of the British Isles, on siliceous rocks and large boulders

Determiner: 
Christine 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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