| Cetraria aculeata |
| Nederlands | : | Gewoon kraakloof |
| English | : | Spiny heath lichen |
| Deutsch | : | Stachel-Hornflechte |
| Norsk | : | groptagg |
| Svenska | : | hedlav |
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| Bergen (NH), the Netherlands; 29 December 2013. Also visible: Cladonia uncialis and Claonia foliacea. |
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| Radio Kootwijk, the Netherlands; 17 November 2013. |
Losser, the Netherlands; 21 September 2013. |