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Physconia distorta (With.) J.R.Laundon


Foliose, thallus green when wet, drying grey or grey-brown, lacking isidia or soralia, tips of lobes pruinose, black bottle-brush-like rhizines on the undersides; apothecia usually present, strongly pruinose, margins thick, warted to minutely lobed. Widespread on bark, rarely on nutrient-enriched rocks.

Refs: Smith et al. (2009), 704; Purvis et al. (1992), 471; Dobson (2005), 343 (photo); Dobson (2011), 343-4 (photo); Jahns (1983), 252-253 (photo, as P. pulveracea, printed with incorrect colour in my copy); Whelan (2011), 131 (photo); Nordic Lichen Flora (2002) 2: 39, 99 (photo); van Haluwyn et al. (2009), 46-7 (photos); van Herk & Aptroot (2004, 2013), 302-3 (photo); Valcárcel et al. (2003), 310-11 (photo); Wirth (1995), 2: 729, 737 (photo); Wirth et al. (2004), 122 (photo); Wirth, Hauck & Schulz (2013), 2: 874, 881 (photo); Frahm et al. (2010), 139 (photo); Moberg & Holmåson (1984), 205 (photo, as P. pulverulacea); Holien & Tønsberg (2008), 79 (photo); Stenroos et al. (2011), 362 (photo); Lichen Atlas of the British Isles 3: 1130 (1998).

Lichenicolous fungi on this host include Taeniolella phaeophysciae.

Physconia distorta
Physconia distorta
Physconia distorta, apothecia, close-up
On Ash (Fraxinus excelsior), Slapton, Devon, August 2011
 
Physconia distorta
Taymouth, Perthshire, April 2002
 
Physconia distorta, close view
In very dry state, Glen Tilt, Perthshire, April 2008


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© A.J. Silverside
Uploaded July 2008, last modified or updated April 2014 (first hosted at www-biol.paisley.ac.uk, January 2003)