Suillus Adans.
A number of species are known in Europe. Fruitbody boletoid without of with partial veil, and then leaving a ring on the stipe. Cap in most species more or less viscid. Stipe solid.
Suillus placidus (Bonord.) Singer
Description
Cap up to 10 cm, at first hemispherical then expanding to convex or somewhat flattened, whitish, ivory or yellowish, sometimes spotted ochraceous. Stipe cylindrical, more or less concolorous with the cap, without ring, covered with numerous 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 7.5–10 × 3–4 μm.
Habitat. Coniferous forests, mycorrhizal with five-needled pines, mostly with the native to Europe Pinus cembra, but also with P. wallichiana and P. strobus.
Distribution. In Europe presumably more northern with few finds in south.
Photographs
Fruitbodies of Suillus placidus in different stages of development. This species is easily distinguished by the striking white colouration of its fruitbodies. (photo M. Danz)
Detail of the stipe surface of Suillus placidus. Note the prominent dark granules. (photo M. Danz)
Important literature
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.
Knudsen, H. & Vesterholt, J. [eds.]. 2008. Funga Nordica. Nordsvamp, Kopenhagen.
Muñoz, J.A. 2005. Boletus s. l. – In: Fungi Europaei. Vol. 1. Pp. 1–951. Edizioni Candusso, Alassio.
Šutara, J., Mikšík, M. & Janda, V. 2009. Hřibovité houby. Čeled’ Boletaceae a rody Gyrodon, Gyroporus, Boletinus a Suillus. Academia, Praha.