Observation 44717: Perenniporia fraxinea (Bull.) Ryvarden

When: 2009-06-08

Collection location: Bevščica, Slovenia [Click for map]

Who: amadej trnkoczy (amadej)

No specimen available

Many fruit bodies present, all around the trunk, many of them dead and black, from its base to up to 1.5 m above ground.

Lat.: 46.38938 Long.: 13.65219
Code: Bot_350/2009-9303/9379/9414

Habitat: A small opening in a fragment of a pristine old Fagus sylvatica alpine forest, nearly full sun, fully exposed to direct rain, precipitations ~3.000 mm/year, average temperature 3-5 deg C, elevation 1.300 m (4.300 feet), alpine phytogeographical region.

Substratum: A large and old, partly rotten, still standing Fagus sylvatica trunk, covered by mosses and Lobaria pulmonaria.

Place: Next to hunter’s cottage above Planina Bala, Bavšcica valley, East Julian Alps, Posočje, Slovenia EC

Date: June 7. 2010
Spore dimensions: 6.0 (SD=0.7) x 3.3 (SD=0.3) micr., Q = 1.8 (SD=0.18), n=30. Motic B2-211A, magnification 1.000 x, oil, in water.

Nikon D70 / Nikkor Micro 105mm/f2.8 and Cannon G11

[admin – Sat Aug 14 01:58:16 +0000 2010]: Changed location name from ‘Bavšcica valley, East Julian Alps, Posočje, Slovenia EC’ to ‘Bavšcica valley, East Julian Alps, Posočje, Slovenia’

Species Lists


Date: June 7. 2010
Date: June 7. 2010
Date: June 7. 2010
Date: June 7. 2010

Proposed Names

28% (1)
Eye3 Eyes3
Recognized by sight
Used references: (1) A. Poler, Ed., Seznam Gliv Slovenie (in Slovene) (Check list of mushrooms of Slovenia), Assoc. of Mycological Societies of Slovenia (1998), p 56
(2) A.Bernicchia, Polyporaceae s.l., Fungi Europaei 10, Edizioni Candusso (2) (2005), p 376
Based on microscopic features: Spore dimensions: 6.0 (SD=0.7) x 3.3 (SD=0.3) micr., Q = 1.8 (SD=0.18), n=30. Motic B2-211A, magnification 1.000 x, oil, in water.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Heterobasidion annosum
By: Gerhard Koller (Gerhard)
2011-07-17 15:48:06 EDT (-0400)

has finely warted spores. Can’t make out on the picture if they are. In water as a mount it is probable not to see the warts though.

By: amadej trnkoczy (amadej)
2011-07-17 15:30:37 EDT (-0400)

Thank you Noah for your suggestion. At the beginning I thought too on Heterobasidion, but studied literature stated conifers as possible substratum. My fund was on Fagus sylvatica for sure. So I haven’t considered this option seriously.

Yet, recently I found two sources which claim broadleaved trees as a possible substratum too. Bernicchia, Polyporaceae s.l., Cabdusso (2005) states Fagus explicitly, although only as a very rare case. I also found some pictures which are very similar to my pictures. Also measured spore dimensions fit reasonably well to Heterobasidion annosum (much better than to any of Ganoderma).

On the other hand, found sporocarps were thicker than they should be, contex was not white (may be a too old one was cut into two?), spores doesn’t seem finely echinulate (my cheap scope?).

Anyway, I will visit the place again and bring home a fresh sporocarp and send it to an expert. Will report if I get an answer.

Could this be
By: Noah Siegel (Noah)
2011-07-12 21:54:22 EDT (-0400)
…un’estrema variabilita… ??
By: amadej trnkoczy (amadej)
2010-06-12 14:18:36 EDT (-0400)

Bernicchia (Ref.: (2)) doesn’t mention the possibility of different types of spores for Ganoderma. But, for P. fraxinea spores he states: “…. misurano 5.5-7.5 × 5-6 micr e presentato un’estrema variabilita da champione a camphione.” May be this explains the discrepancy?

There were not many of spores on my microscope slide (the picture is a CS composition of several shots), but a possibility that I measured spores of something else on this large tree stump of about 2 m height and about 0.8 m in diameter doesn’t seem probable. It is literally covered by Lobaria pulmonaria, but spores of this lichen are much larger and septate. So, Lobaria cannot explain the secret. There are also some very small Cladonia sp. and mosses growing on the stump, but their spores are also different. Anyway, let it remain a secret. Thanks for your comments.

Yes, weird
By: Irene Andersson (irenea)
2010-06-12 11:35:07 EDT (-0400)

It doesn’t look like ordinary basidiospores from Ganoderma, and not anything from Perenniporia fraxinea or Fomes fomentarius either.
I have read about Ganoderma, that they have 3 different kinds of spores, but haven’t seen pictures or any detailed descriptions of the others..

Spores don’t fit
By: amadej trnkoczy (amadej)
2010-06-11 15:33:27 EDT (-0400)

I visited the place again and took fresh young samples to get spores. Spores and their dimensions as well as dimensions from literature (Ref.:(2), Bernicchia) are shown on Figs. 88899 and 88904. Unfortunately, measured spores don’t fit neither to Perenniporia fraxinea nor to any Ganoderma in Refs.: (1) and (2) (G. lucidum and G. resinaceum not shown due to too different habitus). Is it possible that I didn’t measure mature spores? I’m confused now.

By: Irene Andersson (irenea)
2010-05-01 11:16:51 EDT (-0400)

Nothing is really speaking against Ganoderma anywhere in the pictures (could perhaps be Ganoderma australe).
If you come across them again, cut and save a piece of the pore layer and try to find spores (if it hasn’t released them by then).

two species?
By: amadej trnkoczy (amadej)
2010-04-30 15:57:01 EDT (-0400)

Thanks for your comment Irene. I have another observation of Ganoderma applanatum (pretty sure a correct determination) and the tube layer indeed looks very similar to the picture 84213 although it was quite variable in this observation as shown on pics 84215 and 84217. But on the other side many sporocarps observed in this observation seem to me to belong to a single species and the upper sides of them don’t resemble me to Ganoderma (applanatum)(very little brown tones). At least to my limited experience. Or could my pictures show two species?

Pict 84213
By: Irene Andersson (irenea)
2010-04-25 16:27:08 EDT (-0400)

makes me suspect a Ganoderma

Created: 2010-04-25 15:12:08 EDT (-0400)
Last modified: 2010-08-13 21:58:16 EDT (-0400)
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