Observation 87433: Stereum rugosum Pers.

When: 2012-01-21

Collection location: Bovec basin, East Julian Alps, Posočje, Slovenia [Click for map]

46.33611° 13.52567°

Who: amadej trnkoczy (amadej)

Specimen available

Code: Bot_591/2012_DSC2542

Habitat: Secondary mixed forest, deciduous trees dominant, nearly flat terrain, cretaceous clastic rock (flysh) bedrock, in shade, partly protected from direct rain by tree canopies, relatively humid and warm place, average precipitations ~ 3.000 mm/year, average temperature 8-10 deg C, elevations 460 m (1.500 feet), alpine phytogeographical region.

Substratum: dead but still standing and not yet debarked Alnus incana.

Place: Bovec basin, west of Bovec, near the end of the trail from station A of the Kanin cable car to village Plužna, East Julian Alps, Posočje, Slovenia EC

Comments: Growing on mossy bark of a tree. Photographed in almost dry state. Hymenium dull ocher-orange (oac757), at the thin margins almost white; mostly resupinate, rarely somewhat effused-reflexed, small ‘huts’ blackish-brouwn; SP abundant, creme color (oac857); after keeping it at 100% relative humidity and room temperatures for a few days it started bruising reddish when handled and secreting blood-red milk when scratched with a needle or knife.

Spores smooth, dimensions: 10.4 (SD = 0.7) x 4.7 (SD = 0.4) micr., Q = 2.21 (SD = 0.24), n = 30. Motic B2-211A, magnification 1.000 x, oil, in water.

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

Species Lists


Some kind of apparently octahedron crystals present in context positioned mainly in a kind of loose layer. I have no idea what are these?

Proposed Names

85% (1)
Eye3 Eyes3
Recognized by sight
Used references: (1) A.Bernicchia, S.P.Gorjon, Cortitiaceae s.i., Flora Europea Vol.12., Edizioni Candusso (2010), pp 640.
(2) G.J.Krieglsteiner (Hrsg.), Die Grosspilze Bade-Württembergs, Band 1., Ulmer (2000), p 336.
(3) R.Phillips, Mushrooms, Macmillan (2006), p 317.
(4) M.Bon, Parey’s Buch der Pilze, Kosmos (2005), p 310.
Based on microscopic features: Spores smooth, dimensions: 10.4 (SD = 0.7) x 4.7 (SD = 0.4) micr., Q = 2.21 (SD = 0.24), n = 30. Motic B2-211A, magnification 1.000 x, oil, in water (spores) and 400x, Congo red (context crystals).

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thank you very much Amadej.
By: Paul Sadowski (pabloski)
2012-02-06 17:29:45 CST (-0500)
SP abundant
By: amadej trnkoczy (amadej)
2012-02-06 17:24:03 CST (-0500)

I put fungus on a glass plate. Then I cover it by water soaked toilet tissue and tightly cover everything with a plastic cover for about two days at room temperature. This time spore print was unusually abundant in spite of that that the fungus was almost completely dry when collected. In other cases when I can get only one or a few spores on a picture I take several pictures and then copy/paste individual spores into a single picture using PhotoShop. I am doing this almost every time in case spores are very small. My scope is a cheap thing and has serious curvature of field aberration at 1.000 magnification. So, small spores are sharp only in the center part of the view-field and very unsharp in the corners. In the same way I replace these by sharp spores from central parts of other shots. Generally, crust fungi are quite generous with me in respect of spores (although, not many photographed yet). I have more problems with some polypores.

Excellently documented post. Question:
By: Paul Sadowski (pabloski)
2012-02-06 16:26:22 CST (-0500)

How did you manage to obtain so many spores? I am lucky to get one or two from such crust fungi.

Created: 2012-02-06 15:02:26 CST (-0500)
Last modified: 2017-06-20 19:22:19 CDT (-0400)
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