As this article doesn't contain an abstract, the image below is necessary to enable the article to be indexed by certain search engines. The resolution of the full-text PDF is much higher than that shown here.
Caloplaca britannica common in non-maritime environments
André Aptroot a1andC. M. van Herk a2 a1 Centraalbureau voor Schimmelcultures, P.O. Box 85167, NL-3508 AD Utrecht, The Netherlands a2 Lichenologisch Onderzoeksbureau Nederland, Goudvink 47, NL-3766 WK Soest, The Netherlands
The genus Caloplaca is taxonomically difficult. Many species are characterized by a combination of morphological traits, and there are only a few useful microscopic characters. The secondary chemistry is rather uniform and of little taxonomic value, notwithstanding the usually bright pigmentation.