Suillus Adans.
A number of species are known in Europe. Fruitbody boletoid without or with partial veil, and then leaving a ring on the stipe. Cap in most species more or less viscid. Stipe solid.
Suillus granulatus (L. : Fr.) Roussel
Description
Cap up to 10 cm, at first hemispherical then expanding to convex, ochraceous to brownish or orange brown, viscid when wet. Stipe, cylindrical, often tapering below, more or less yellowish, without ring, covered with numerous small whitish to brownish glandular dots. Flesh whitish. Tubes pale yellow to olivaceous yellow. Pores fine, rounded, pale yellow to olivaceous yellow. Smell not distinctive. Taste not distinctive. Spores 8–10 × 3–4 μm.
Habitat. Coniferous or mixed forests, artificial plantations, mycorrhizal with pines (Pinus).
Distribution. In Europe extremely widespread and common.
Similarity. Apparently similar to the southern Suillus mediterraneansis and distinguished on the account of the whitish (and not yellowish) flesh. Probably sometimes confused with Suillus collinitus, the later however has very distinct pinkish colour at the stipe base and usually darker cap.
Photographs
Fruitbodies of Suillus granulatus. (photo I. Assyova)
Well developed fruitbodies of Suillus granulatus. (photo I. Assyova)
Large group of young fruitbodies of Suillus granulatus. (photo B. Assyov)
The same group shown on the previous photo but this picture was taken few hours later. (photo B. Assyov)
Well developed fruitbodies of Suillus granulatus. (photo B. Assyov)
As in some other species, the pores of Suillus granulatus exude small droplets of milky liquid (seen on the pores and in the upper parts of the stipe), which will later dry into dark granules on the stipe surface. See also the photograph below. (photo M. Mikšík)
Granulations of the stipe of Suillus granulatus. (photo I. Assyova)
Important literature
Alessio, C.L. 1985. Boletus Dill. ex L. (sensu lato). – In: Fungi Europaei. Vol. 2. Pp. 1–705. Libreria editrice Biella Giovanna, Saronno.
Breitenbach J. & Kränzlin F. 1991. Pilze der Schweiz. Bd. 3(1). Röhrlinge und Blätterpilze. Verlag Mykologia, Luzern.
Engel, H., Dermek, A., Klofac, W., Ludwig, E. & Brückner, T. 1996. Schmier – und Filzröhrlinge s. l. in Europa. Die Gattungen Boletellus, Boletinus, Phylloporus, Suillus, Xerocomus. Verlag Heinz Engel, Weidhausen b. Coburg.
Estadès, A. & Lannoy, G. 2004. Les bolets européens. – Bulletin Mycologique et Botanique Dauphiné-Savoie 44(3): 3–79.
Galli, R. 1998. I Boleti. Atlante pratico-monographico per la determinazione dei boleti. Edinatura, Milano.
Hansen, L. & Knudsen, H. 1992. Nordic Macromycetes. Vol. 2. Polyporales, Boletales, Agaricales, Russulales. Nordsvamp, Copenhagen.
Knudsen, H. & Vesterholt, J. [eds.]. 2008. Funga Nordica. Nordsvamp, Kopenhagen.
Lannoy, G. & Estadès, A. 2001. Les Bolets. Flore mycologique d’Europe. Documents Mycologiques Mémoire Hors série no. 6. Pp. 1–163. Association d’Écologie et de Mycologie, Lille.
Muñoz, J.A. 2005. Boletus s. l. – In: Fungi Europaei. Vol. 1. Pp. 1–951. Edizioni Candusso, Alassio.
Pilát, A. & Dermek, A. 1974. Hríbovité huby. Československé hríbovité a sliziakovité huby (Boletaceae – Gomphidiaceae). Veda, Bratislava.
Šutara, J., Mikšík, M. & Janda, V. 2009. Hřibovité houby. Čeled’ Boletaceae a rody Gyrodon, Gyroporus, Boletinus a Suillus. Academia, Praha.
Watling, R. 1970. Boletaceae, Gomphidiaceae, Paxillaceae. – In: Henderson, D.M., Orton, P.D. & Watling, R. [eds]. British fungus flora. Agarics and Boleti. Vol. 1. Royal Botanic Garden, Edinburgh.
Watling, R. & Hills, A.E. 2005. Boletes and their allies (revised and enlarged edition). – In: Henderson, D.M., Orton, P.D. & Watling, R. [eds]. British Fungus Flora. Agarics and boleti. Vol. 1. Royal Botanic Garden, Edinburgh.