Observation 185610: Pycnoporellus fulgens (Fr.) Donk

Code: Bot_840/2014_DSC4365

Habitat: an opening (under power lines) in mixed wood (Picea abies and Fagus sylvatica dominant trees) on old overgorwn river deposits, flat terrain, calcareous ground, an open place but not much sun because of a high mountain southeast of the place, moderately humid place, exposed to direct rain, average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 550 m (1.800 feet), alpine phytogeographical region.

Substratum: dead fallen Picea abies log, partly still in bark, lying on ground, Fomitopsis pinicola pilei present on the same log.

Place: Lower Trenta valley, left bank of river Soča, slightly upstream of farmhouse ‘Otokar’, Trenta 4, East Julian Alps, Posočje, Slovenia EC

Comments: When I saw this polypore from far I was convinced it is Pycnoporus cinnabarinus since this is a common and to my knowledge the only one bright orange-red polypore here around. What attracted me was unusual substratum Picea abies, which very rarely happens with this species. Yet, a closer look revealed this is a wrong idea. Advised to check genus Abortiporus (Slovenian fungi check list knows only Abortiporus biennis) I realized this is a more promising option. However, vivid color of the find seemed to me (and still does) a problem. Most descriptions and pictures of this species in literature show much different whitish or brownish polypore, apparently growing from ground and having very different habitus. Only after some additional reading I realized that this is an extremely variable species in every aspect and many times literally ‘distorted’ in its form. Also brown-reddish sporocarps in the form of applanate pilei may occur. As to substratum most sources state broadleaved trees and mention conifers as a possible, but much less probable option. Most other checked morphologic and microscopic traits of Abortiporus biennis fit reasonable well to what I found. However, for my limited experience, the vivid color of the sporocarps remains suspicious and my determination may be wrong. Can the fact that the pilei were rather old, grew on an unusual substratum, and possibly due to some other local environmental conditions such intense color develops?

Growing in a group of about ten pilei; pilei applanate to slightly effused-reflexed, broadly attached; semicircular to slightly dimidiate, pliant but solid, with softer, wet surface; dimensions: up to 10 cm wide, projecting up to 6 cm off the substratum and up to 1.8 cm thick; distinct lateral stipe absent; pores up to 6 mm long; pore surface discolors to pale brown-red when handled; SP whitish-yellowish, oac909.

Nikon D700/Nikkor Micro 105mm/f2.8

Proposed Names

24% (2)
Used references: (1) L. Ryvarden, R.L. Gilbertson, European Polypores, part 1., Synopsis Fungorum 7., Fungiflora A/S (1993), p 83.
(2) A. Bernicchia, Polyporaceae s.l., Fungi Europaei, Vol. 10., Edizioni Candusso (2005), p 75.
(3) R.M. Daehncke, 1200 Pilze in Farbfotos, AT Verlag (2009), p 1066.
(4) J. Breitenbach, F. Kraenzlin, Eds., Fungi of Switzerland, Vol.2.,Verlag Mykologia (1986), p 310.
(5) M. Bon, Parey’s Buch der Pilze, Kosmos (2005), p 314.
(6) L. Ryvarden, R.L. Gilbertson, European Polypores, part 2., Synopsis Fungorum 7., Fungiflora A/S (1993), p 595. (Pycnoporus cinnabarinus)
(7) G.J. Krieglsteiner (Hrsg.), Die Grosspilze Baden-Württembergs, Band 1., Ulmer (2000), p 468.
(8) Personal communication with Mr. Bojan Rot, www.gobenabovskem.com
Based on microscopic features: Spores smooth. Dimensions:5,2 [5,8 ; 6,1] 6,7 × 3,1 [3,5 ; 3,6] 4 micr.; Q = 1,4 [1,6 ; 1,7] 1,9; N = 33; C = 95%; Me = 5,9 × 3,6 micr.; Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil. AmScope MA500 digital camera.
Based on chemical features: Smell none, taste at the beginning mildly mushroomy later somewhat unpleasant.

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Add Comment
thanks a lot
By: amadej trnkoczy (amadej)
2015-10-06 06:00:07 CDT (-0400)

Great! This is the right answer to my suspicions with this determination.
Thanks Susanne.

Pycnoporellus fulgens has extended its range in Europe
By: Susanne Sourell (suse)
2015-10-05 07:06:21 CDT (-0400)

Created: 2014-10-26 07:11:36 CDT (-0400)
Last modified: 2015-10-05 07:02:15 CDT (-0400)
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