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Lepraria membranacea (Dicks.) Vain.
 
(= Leproloma membranaceum (Dicks.) Vain.)


Thallus white to cream or greyish, leprose (granular surface), lacking a true upper cortex, but with a membranous medulla that forms a lobed crust, sometimes of an almost foliose morphology, lobes sometimes imbricated in sheltered locations, lobe margins turned upwards; apothecia unknown. On vertical, nutrient-poor, shaded rock-faces and acid tree bark, widespread, often common in the north and west.

Refs: Smith et al. (2009), 538; Purvis et al. (1992), 348 (as Leproloma); Dobson (2005), 244 (photo, as Leproloma); Dobson (2011), 249-50 (photo); Moberg & Holmåson (1984), 221 (photo); Holien & Tønsberg (2008), 169 (photo); Stenroos et al. (2011), 243 (photo); Wirth (1995), 2: 545 (photo, as Leproloma); Wirth, Hauck & Schulz (2013), 2: 677 (photo), 679; van Herk & Aptroot (2004, 2013), 236-7 (photo, as Leproloma); Valcárcel et al. (2003), 232-3 (photo, as Leproloma); Brodo et al. (2001), 398-9 (photo, as Leproloma); Lichen Atlas of the British Isles 4: 1603 (1999) (as Leproloma).

Lepraria membranacea
Lepraria membranacea
Lepraria membranacea
Lepraria membranacea
On Sessile Oak (Quercus petraea), Aberfoyle, Stirlingshire, March 2009


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Uploaded February 2013, last updated December 2013