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Protoparmelia nephaea (Sommerf.) R.Sant.
Thallus a chestnut brown, areolate crust, with a black prothallus that, when first establishing and at the margins, forms minute, radiating lobes; areoles occasionally with soralia, prothallus margins often sooty with conidia, apothecia rare. On rockfaces in the Scottish Highlands, rare.
Refs: Smith et al. (2009), 755; Purvis et al. (1992), 503; Wirth (1995), 1: 454 (in Lecanora key).
On metalliferous rockface, Braemar, Aberdeenshire, March 2008
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Uploaded May 2009, last modified June 2010
