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Images of British Lichens

Lecanora intricata (Ach.) Ach.

Thallus cream to yellowish or grey-green, cracked areolate, the areoles with minutely crenulate margins; soredia absent; apothecia usually crowded, discs green to green-brown, becoming translucent green when wet, smooth and appearing waxy, usually with some darker and these remaining immersed in the thallus surface. Widespread but more common in the north and west, on base-poor rocks, stonework and worked wood.

Refs: Smith et al. (2009), 489; Purvis et al. (1992), 308; Dobson (2005), 224-5 (photo); Dobson (2011), 228 (photo); van Herk & Aptroot (2004, 2013), 214-215 (photo); Wirth (1995), 1: 454, 455 (photo); Wirth, Hauck & Schulz (2013), 1: 578, 601 (photo); Moberg & Holmåson (1984), 113 (photo); Hansen & Anderson (1995), 94 (photo); Thomson (1997), 287-9 (photo).

Requires careful distinction from greenish variants of L. polytropa. L. soralifera is also similar when with apothecia, but it is sorediate and the apothecia are smaller. All three species can grow together, with the thalli intermixed.

Lecanora intricata
On old wooden fence, Kindrogan, Perthshire, March 2008

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© A.J. Silverside
Uploaded November 2008, last updated December 2013