B. Papp szerk.: Studia Botanica Hungarica 39. 2008 (Budapest, 2008)

Vasas, G.: Interesting macrofungi in Hungary VII. Boletopsis leucomelaena

22 VASAS. G (Quercuspetraea) and Scots pine (Pinus sylvestris) were found intermingled with beech (Fagus sylvatica). In the same year and month, one day later (October 6, 2005) Boletopsis leucomelaena was also found by the author of the present article in the Mátra mountains in acidic beech forest (Luzulo nemorosae- Fagetum sylvaticae) near Mátraháza. The vouchers of this latter collection are deposited in the herbarium of the Hungarian Natural History Museum (BP). Boletopsis Fayod 1889 As shown by shifting the genus into various taxonomic entities, the position of Boletopsis have been challenged by subsequent authors. BONDARZEW and SINGER (1941) suggested to place it in family Boletopsidae, while Kotlába és Pouzar moved the genus into Phylacteriaceae (KRIEGLSTEINER 2000). Based on its squared and light-coloured spores and the telephoric acid content of its fruit body however, it is discussed by KRIEGLSTEINER (2000) - in agreement with a number of mycologists - in the family Thelephoraceae. Lately, the genus was again moved, this time into the order Thelephorales within family Banketaceae, along with the genera Bankéra, Pbellodon, Hydnellum, and Sarcodon (CABI 2008, HROUDA 2005b). As listed by Index Fungorum (CABI 2008), the genus Boletopsis now contains five accepted species as follows, B. atrara Ryvarden 1982, B. grisea (Peck) Bondarzew et Singer 1941, B. leucomelaena (Pers.) Fayod 1889, B. perplexa Watling et J. Milne 2006, B. smitbii K. A. Harrison 1975. Of these, two species occur in the notthern hemisphere: B. grisea and B. leucomelaena; although JÜLICH (1984) questions the existence of B. grisea and accepts only B. leucomelaena as a definitely "good" species. RYVARDEN and GlLBERTSON (1993), however, do see some distinction between the two species by attributing B. leucomelaena a dark gtay or blackish cap and assigning a calcareous Piceetum as its habitat; while B. grisea has gray cap and occurs in sandy soils in pine forest. The two species are separated in the same way by HROUDA (2005b). The species of Boletopsis have one-year fruitbody consisting of a stem and a cap-like part. The hymenium structure is monomitic, the generative hyphae are translucent, with thin walls. The spores are squared, translucent, pale btown. These are terricolous mycorrhizal species. Boletopsis leucomelaena (Pers.) Fayod 1889 A sub-eu-montane species, it is rare in Europe and also in North America, occurring between 200—1,000 m above sea level. Apparently, it is largely missing from Germany, where all documented occurrences are from before 1970. According to KRIEGLSTEINER