Observation 196112: Bjerkandera adusta (Willd.) P. Karst.

Code: Bot_854/2014_DSC5245

Habitat: alpine valley, river bank, locally almost flat terrain, calcareous ground, river bank vegetation mostly consisting of Salix eleagnos, Picea abies and some Fagus sylvatica; humid air and ground, partly sunny, exposed to direct rain; average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 525 m (1.720 feet), alpine phytogeographical region.

Substratum: dead wood, a stump of cut down Salix eleagnos in its late initial phase of disintegration.

Place: Lower Trenta valley, left bank of river Soča between villages Soča and Trenta, 50 m downstream of the bridge to the farmhouse ‘Matevž’, Trenta 3, East Julian Alps, Posočje, Slovenia EC.

Growing in imbricate groups of several fruit bodies; pilei 1.2 – 2.8 cm across, trama pale brown, corky-fibrous (cannot be chewed over but can be nicely cut with a razor), up to 4.5 mm thick, pore layer dark-grey and distinctly darker then trama, about 1 mm thick; stipe absent; SP faint, whitish.

Nikon D700/Nikkor Micro 105mm/f2.8 and Canon G11, 6.1-30mm/f2.8-4.5

Species Lists


Shown with Crepidotus mollis (right side).
These were very young fruit bodies, with still white or pale gray pore surface, with very, very small still developing pores.

Proposed Names

91% (2)
Eye3 Eyes3
Recognized by sight: Gray and very small pores, darker pore layer than trama.
Used references: (1) J. Breitenbach, F. Kraenzlin, Eds., Fungi of Switzerland, Vol.2. Verlag Mykologia (1986), p 268.
(2) M. Bon, Parey’s Buch der Pilze, Kosmos (2005), p 316.
(3) L. Ryvarden, R.L. Gilbertson, European Polypores, part 1., Synopsis Fungorum 7., Fungiflora A/S (1993), p 168. (Hrsg.), Die Grosspilze Baden-Württembergs, Band 1., Ulmer (2000), p 486.
(5) A. Bernicchia, S.P.Gorjon, Cortitiaceaes.i., Fungi Europaei Vol.12., Edizioni Candusso (2010), p 139.
Based on microscopic features: Spores smooth. Dimensions: 4.1 [4.5 ; 4.7] 5.1 × 2.6 [2.9 ; 3] 3.4 microns; Q = 1.3 [1.5 ; 1.6] 1.8; N = 37; C = 95%; Me = 4.6 × 3 microns; Qe = 1.6. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil; in water, live material. AmScope MA500 digital camera.
Based on chemical features: Taste mild, slightly unpleasant but not bitter; smell on sour earth similar to Trametes versicolor.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-01-12 09:30:23 CST (-0600)
Last modified: 2015-01-12 09:49:40 CST (-0600)
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