Observation 219896: Postia caesia (Schrad.) P. Karst.

Habitat: on a large pile of Picea abies cut off trunks and thrown away rotten timber; in light mixed wood, Picea abies, Ostrya carpinifolia and Fagus sylvatica dominant trees; slightly inclined mountain slope, south aspect; calcareous, skeletal ground; in shade; moderately dry and relatively warm place; partly protected from direct rain by tree canopies; average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 595 m (1.950 feet), alpine phytogeographical region.

Substratum: on a cut-off surface of a dead trunk of Picea abies; partly debarked; in late initial stage of disintegration.

Place: Lower Trenta valley, right bank of river Soča, between villages Soča and Trenta, below of ‘Na melu’ place; south of cottage Trenta 2b, East Julian Alps, Posočje, Slovenia EC

Comments: Growing in two small groups of partly fuzzed pilei; the largest pileus dimensions 4.8 × 2.5 cm, tube layer up to 5 mm thick; trama up to 3 mm thick; flesh soft; SP abundant, whitish-grayish with a blue tint, oac305.

Nikon D700/Nikkor Micro 105mm/f2.8

Proposed Names

85% (1)
Eye3 Eyes3
Recognized by sight: Bluish and soft.
Used references: (1) A.Bernicchia, Polyporaceaes.l., Fungi Europaei Vol.10., Edizioni Candusso (2005), p 332.
(2) S. Buczacki, Collins Fungi Guide, Collins (2012), p 490.
(3) M. Bon, Parey’s Buch der Pilze, Kosmos (2005), p 316.
(4) R. Phillips, Mushrooms, Macmillan (2006), p 313.
(5) G.J. Krieglsteiner (Hrsg.), Die Grosspilze Baden-Württembergs, Band 1, Ulmer (2000), p 548.
(6) L. Ryvarden, R.L. Gilbertson, European Polypores, part 2., Synopsis Fungorum 7., Fungiflora A/S (1994), p 435.
Based on microscopic features: Spores smooth, cylindrical and allantoid. 4,7 [5,2 ; 5,4] 5,9 × 1,4 [1,6 ; 1,7] 2 microns; Q = 2,5 [3,1 ; 3,3] 3,8; N = 35; C = 95%; Me = 5,3 × 1,7 microns; Qe = 3,2. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil, in water. AmScope MA500 digital camera.
Based on chemical features: Smell mild, mushroomy; taste mild, mushroomy, after some time slightly unpleasant; 5% KOH on pore layer gray-blue-green, on hut surface gray-green.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-10-20 07:21:05 CDT (-0400)
Last modified: 2015-10-20 07:21:28 CDT (-0400)
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