Buchwaldoboletus Pilát
Two species are known in Europe. Saprotrophic on dead wood of conifers, one species probably mycoparasite on Phaeolus schweinitzii. Fruitbody boletoid. Cap dry. Pores and tubes yellow to olivaceous yellow. Flesh whitish or yellowish, unchanging or blueing slightly.
Buchwaldoboletus sphaerocephalus (Barla) Watling
Description
Fruitbodies rather robust. Cap up to 20 cm, at first hemispherical then expanding to convex, pale ochraceous, yellowish or almost white, velvety, distinctly dry even in wet weather, unchanging when bruised; cap margin inrolled for a long time. Stipe cylindrical or clavate, usually tapering towards the base, more or less smooth, almost concolorous with the cap. Flesh whitish to pale yellowish, slightly blueing when exposed to air or sometimes not blueing. Tubes at first bright yellow, then with somewhat olivaceous tint, blueing when exposed to air. Pores bright yellow, blueing when bruised. Smell not distinctive. Taste not distinctive. Spores 6.5–9.5 × 3–4.5 μm.
Habitat. Coniferous forests, associated with dead stumps of conifers, mostly pines (Pinus).
Distribution. Widespread in Europe, but rare throughout.
Similarity. Buchwaldoboletus sphaerocephalus could be possibly mistaken with Boletus radicans. The later however is a mycorrhizal fungus with distinctly bitter flesh and often with well developed network on the stipe.
Photographs
I am not yet hosting photographs of this species but there are some on the internet. Please visit the links below.
Celestino Gelpi’s photos of Buchwaldoboletus sphaerocephalus
Buchwaldoboletus sphaerocephalus on Micogest
Buchwaldoboletus sphaerocephalus on Setas del Monkayo
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.
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.
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.
Mikšík, M. 2010. [Buchwaldoboletus lignicola and B. sphaerocephalus in the Czech Republic.]. – Mykologický Sborník 87(3–4): 55–65 + figs 47–51. (In Czech; available online on boletales.com)
Muñoz, J.A. 2005. Boletus s. l. – In: Fungi Europaei. Vol. 1. Pp. 1–951. Edizioni Candusso, Alassio.
Ortiz-Santana, B. & Both, E.E. 2011. A preliminary survey of the genus Buchwaldoboletus. – Bulletin of the Buffalo Society of Natural Sciences 40: 1–14. (available online)
Pilát, A. 1969. Buchwaldoboletus. Genus novum Boletacearum. – Friesia 9: 217–218. (the paper on boletales.com; off-site link to the entire issue of the journal)
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. & 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.