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Images of British Lichens

Rimularia intercedens (H.Magn.) Coppins

Thallus pale greyish or pinkish brown, minutely cracked-areolate with the black prothallus visible between the areoles, individual areoles developing single, central, pimple-like isidia; apothecia very rare. On siliceous rocks in the north and west.

Refs: Smith et al. (2009), 811; Purvis et al. (1992), 389 (as Mosigia intercedens); Wirth (1995), 2: 820.

Rimularia intercedens
On old graveyard wall, Ardclach, Morayshire, August 2010
Rimularia intercedens
In lichen mosaic with Rhizocarpon geographicum, on siliceous upland boulder, Braemar, Aberdeenshire, March 2008

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© A.J. Silverside
Uploaded August 2009, last updated November 2011