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Candelariella reflexa (Nyl.) Lettau


Thallus of dispersed to densely aggregated, yellow-green granules and tiny, rounded, corticate squamules of mixed sizes, these frequently becoming yellow-sorediate, non-reactive with KOH; apothecia yellow, rare. Widespread and often common on nutrient-enriched tree trunks, often as small thalli amongst other lichens on somewhat shaded bark, but becoming dominant on trunk-bases where dogs urinate.

Refs: Smith et al. (2009), 277; Purvis et al. (1992), 161; Dobson (2005), 112 (photo); Dobson (2011), 121-2 (photo); van Haluwyn et al. (2009), 144-5 (photo); van Herk & Aptroot (2004, 2013), 110-111 (photo); Wirth (1995), 1: 243, 245 (photo); Wirth, Hauck & Schulz (2013), 1: 322 (photo); Frahm et al. (2010), 60 (photo); Thor & Arvidsson (1999), 244 (photo); Puntillo (1996), plate 9 (photo).

Easily confused with species of the Caloplaca citrina group (Flavoplaca), notably with C. flavocitrina, but these react purple with potassium hydroxide (KOH).

 
Candelariella reflexa
Candelariella reflexa, close view
On nutrient-enriched tree-base in parkland, Pembroke, Pembrokeshire, May 2009


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Uploaded February 2014