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Images of British Lichens

Lecanographa amylacea (Ehrh. ex Pers.) Egea & Torrente

Thallus a chalky-white crust, surface white-powdery and often dotted with brown flecks; apothecia rare (but shown below), black but surface strongly white-pruinose. A very local and rare species of dry bark in ancient oak (Quercus) woodland in the north and west, said often to be low on the trunks and where it is not exposed to direct rain.
British Red Data Book species: vulnerable.

Refs: Smith et al. (2009), 464; Purvis et al. (1992), 283 (as Lecanactis amylacea); Dobson (2005), 206 (photo); Dobson (2011), 211 (photo); Wirth (1995), 1: 440, 443 (photo); Wirth, Hauck & Schulz (2013), 1: 556 (photo); Frahm et al (2010), 58 (photo); Thor & Arvidsson (1999), 291 (photo, as Opegrapha illecebrosa); Arup et al. (1997), 192 (photo, as Opegrapha illecebrosa); Puntillo (1996), plate 21 (photo).

Lecanographa amylacea
Lecanographa amylacea
Lecanographa amylacea
On Oak (Quercus), dry bark, Cawdor Wood, Nairnshire, August 2010 (BLS meeting)
Lecanographa amylacea
On Oak (Quercus), dry bark, Logie, Morayshire, August 2010 (BLS meeting)

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© A.J. Silverside
Uploaded August 2013, updated September 2013