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Images of British Lichens



Squamarina cartilaginea (With.) P.James


Thallus consisting of overlapping, lobed squamules, yellowish- or grey- to brownish green, dark beneath, often pruinose at least at the margins; apothecia common, orange-brown, with pale, thalline margins that often become turned under at maturity. Mostly on limestone, predominantly coastal, or inland on limestone scars in the Pennines, more rarely on calcareous soils or on serpentine rock.

Refs: Smith et al. (2009), 851; Purvis et al. (1992), 572; Dobson (2005), 411 (photo); Dobson (2011), 416 (photo); Jahns (1983), 204-5 (photo, as S. 'cartilaginae'); Wirth (1995), 2: 868 (photo); Wirth et al. (2004), 166 (photo); Wirth, Hauck & Schulz (2013), 2: 1045-7 (photos); Schumm (2011), 345-349 (photos, photomicrographs); Moberg & Holmåson (1984), 118 (photo); Valcárcel et al. (2003), 352-3 (photo).

Squamarina cartilaginea
Squamarina cartilaginea, closer view
On limestone scar, Giggleswick, Yorkshire, May 2010
 
Squamarina cartilaginea, barren
Squamarina cartilaginea
Squamarina cartilaginea, closer view
Squamarina cartilaginea, moist
On limestone scar, Shap, Westmorland, April 2012. Lowest photograph shows colony in moist state.
 
Squamarina cartilaginea
On limestone sea-cliff, Stackpole, Pembrokeshire, May 2009
 
Squamarina cartilaginea
Squamarina cartilaginea
Squamarina cartilaginea, habitat
On limestone sea-cliff, Durness, West Sutherland, July 2012.


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© A.J. Silverside
Uploaded October 2012, updated September 2013