Images of British Lichens
Verrucaria mucosa Wahlenb.
Thallus forming discrete or extensive, green to dark olive or blackish patches on rocks, smooth and somewhat oily-glossy, sometimes with a white prothallus showing at the edges or in eroded cracks; perithecia minute, immersed in the thallus. Often very common on intertidal rocks, around the British coast where suitable habitat exists. Immersed perithecia can also be the parasitic Stigmidium marinum (Dobson, 2005).
Refs: Smith et al. (2009), 952; Purvis et al. (1992), 639; Orange (2008); Dobson (2005), 451 (photo); Dobson (2011), 457, 458 (photo); Whelan (2011), 150 (photo); Thomson (1997), 640.
|On intertidal rocks, Great Cumbrae (Clyde Isles), April 2009|
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Uploaded February 2011, updated May 2012