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Images of British Lichens

Hymenelia prevostii (Duby) Kremp.

Thallus a thin, cream to pale brown crust, partly immersed in the rock surface or superficial and becoming cracked-areolate; apothecia pink-brown, often surrounded by a circular fissure. Very similar to H. epulotica but with a chlorococcoid photobiont, so not scratching yellow-orange. Widespread but very local on hard limestones.

Refs: Smith et al. (2009), 434; Purvis et al. (1992), 273; Dobson (2005), 189 (photo); Dobson (2011), 194 (photo).

Hymenelia prevostii
On limestone rockface, Schiehallion, Perthshire, April 2003

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© A.J. Silverside
Uploaded March 2008, last updated October 2013 (first hosted at, June 2007)