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Revision of Boletus section Appendiculati (Boletaceae) in Bulgaria with a key to the Balkan species

The paper presents the results from the taxonomic revision of Boletus section Appendiculati in Bulgaria. Descriptions are provided based on Bulgarian specimens for the 5 species of the section: Boletus appendiculatus, B. fechtneri, B. fuscoroseus, B. regius, and B. subappendiculatus. | Research Article Turk J Bot 36 (2012) 408-419 © TÜBİTAK doi:10.3906/bot-1104-10 Revision of Boletus section Appendiculati (Boletaceae) in Bulgaria with a key to the Balkan species Boris ASSYOV* Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Str., 1113 Sofia - BULGARIA Received: 12.04.2011 Accepted: 12.01.2012 Abstract: The paper presents the results from the taxonomic revision of Boletus section Appendiculati in Bulgaria. Descriptions are provided based on Bulgarian specimens for the 5 species of the section: Boletus appendiculatus, B. fechtneri, B. fuscoroseus, B. regius, and B. subappendiculatus. The priority of the name B. fuscoroseus against B. pseudoregius is briefly discussed. A dichotomous key for the determination of members is also included. Key words: Basidiomycetes, Boletales, boletes, Bulgaria, fungal diversity Introduction Section Appendiculati Konrad & Maubl. ex Lannoy & Estadès is a well defined entity in the genus Boletus L., members of which are found throughout the northern hemisphere (Singer, 1986). It is characterised by the more or less developed reticulum on the stipe and concolourous yellow and often blueing tubes and pores as well as by the flesh, which may be blueing or not, but which is always mild tasting and in many species is somewhat pinkish tinted in the stipe base. The members of this group share some characters with section Calopodes Fr. emend. Lannoy & Estadès; the latter, however, are easily distinguished on the basis of their very bitter taste, caused by the presence of calopins and cyclocalopins (Hellwig et al., 2002). Recent molecular research suggests that the genus Boletus, even in its current strict sense, is likely a heterogeneous consortium and further studies are likely to lead to major changes in the generic concept of this group in the future (Watling, 2009). Should * E-mail: bassyoff@hotmail.com 408 this happen, it will certainly affect the status of Appendiculati; .