Observation 64299: Hymenoscyphus pseudoalbidus Queloz, Grünig, Berndt, T. Kowalski, T.N. Sieber & Holdenr.
When: 2010-08-01
(46.33515° 13.53045° )
No herbarium specimen

Notes: Code: Bot_440/2010_DSC3505

Habitat: Mixed woodland, nearly flat ground, cretaceous clastic rock (flysh), partly protected from direct rain by trees canopies, mostly in shade, humid place, average precipitations ~3.000 mm/year, average temperature 8-10 deg C, altitude 435 m (1.450 feet), alpine phytogeographical region.

Substratum: rotten petioles of Acer sp. leaves from last year.

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

Comments: Substrate specific species, yet not completely certain determination. Stalks seem a bit short. Growing in groups of many species, several hundred around. Pileus diameter about 1-3 mm. Picture 136951 (taken on March 3. 2011) shows herbarium dry specimens. Fruitbodies haven’t turned dark brown-black as per J.Breitenbach (1984), which excludes similar R. firma!

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

Species Lists


Picture taken on March 3. 2011 shows herbarium dry specimens. Fruitbodies haven’t turned dark brown-black as per J.Breitenbach (1984), which excludes similar R. firma.
Motic 2B-211, magnification 40 x, incidence light.

Proposed Names

51% (2)
Recognized by sight
Used references: (1) http://www.bio.uio.no/bot/ascomycetes/Taxa/Rutstroemia.html .
(2) M.Bon, Parey’s Buch der Pilze, Kosmos (2005), p 332.
(3) J.Breitenbach, F.Kraenzlin, Eds., Fungi of Switzerland, Vol.1. Ascomycetes, Verlag Mykologia (1984), p 144.
85% (1)
Eye3 Eyes3
Used references: Id’ed by Dr. Nikica Ogris, Slovenian Forestry Institute, Department of Forest Protection

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Hymenoscyphus pseudoalbidus (anamorph Chalara fraxinea) on Fraxinus excelisor petioles
By: Nikica Ogris (nikicao)
2012-01-06 03:37:03 CST (-0500)

This is Hymenoscyphus pseudoalbidus (anamorph Chalara fraxinea) on petioles of Fraxinus excelisor. This fungus cause ash dieback all around Europe. It all starded in 1990’s in Latvia in Poland. See references of Kowalski T. First record of the disease in Slovenia is from 2006. See:

Created: 2011-03-12 16:19:32 CST (-0500)
Last modified: 2012-01-07 03:39:53 CST (-0500)
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