Many species are known in Europe, although recent molecular studies have reduced significantly their number. Although the reader will find numerous references bellow, they should always consult the treatment of Den Bakker & Noordeloos (2005), some of its results also partly available online (see Noordeloos, online) in the form of a key, descriptions and photographs. Useful keys (excluding two south European species) are provided also by Kibby (2006) and Knudsen & Vesterholt (2008). Everybody reading those pages have to bear in mind that identification of Leccinum currently relies on both macroscopic and microscopic characters.
Fruitbody boletoid without veil and ring. Stipe solid, covered with numerous squamules. Flesh whitish or yellowish, sometimes spotted blue or greenish in the stipe base, in many species changing dramatically to pinkish, reddish, violaceous grey to black.
Leccinum rotundifoliae (Singer) A.H. Sm.
I am not providing information for this species. Click here to go to Machiel Noordeloos’ page on Leccinum, where detailed description and other information is provided. Note that the current concept for this species includes Leccinum pulchrum.
Den Bakker, H.C. & Noordeloos, M.E. 2005. A revision of European species of Leccinum Gray and notes on extralimital species. – Persoonia 18: 511–587.
Kibby, G. 2006. Leccinum revisited. A new synoptic key to species. – Field Mycology 7(4): 77–87.
Knudsen, H. & Vesterholt, J. [eds.]. 2008. Funga Nordica. Nordsvamp, Kopenhagen.
Lannoy, G. & Estadès, A. 1995. Monographie des Leccinum d’Europe. Fédération Mycologique Dauphiné-Savoie.
Moingeon, J.-M. & Lannoy, G. 2008. Leccinum rotundifoliae, note sur un bolet rare des regions alpines et subalpines. – Bulletin Trimestriel de la Société Mycologique de France 124: 73–76.
Muñoz, J.A. 2005. Boletus s. l. – In: Fungi Europaei. Vol. 1. Pp. 1–951. Edizioni Candusso, Alassio.
Noordeloos, M. (online). The genus Leccinum in Northern and Central Europe. http://www.entoloma.nl/html/leccinum_eng.html