Observation 141178: Tricholoma ustale (Fr.) P. Kumm.
When: 2012-10-06
(46.4276° 13.6155° 1470m)
No herbarium specimen

Notes: Burnt Knight, DE: Brandige Ritterling
Slo.: osmojena kolobarnica

Dat.: Oct. 06. 2012
Lat.: Long.:
Code: Bot_665/2012_DSC5508

Habitat: In mixed alpine forest, dominant Fagus sylvatica with some Picea abies and Abies alba; locally east, generally south oriented mountain slope, relatively warm place, calcareous bedrock however apparently at least to some extent acid soil (Vaccinium myrtillus abundant); mostly in shade, partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 2-4 deg C, elevation 1.470 m (4.800 feet), alpine phytogeographical region.

Substratum: forest soil under Fagus sylvatica.

Place: Mt. Mangart region, northeast ridge of Mt.Planja, 1.553 m, East Julian Alps, Posočje, Slovenia EC

Comments: Following the key of Tricholoma (Fries.1821) in Ref.:(3), p521 I come to Tricholoma ustale without problems. However, the color of the fruitbodies found seems too to be too bright and to have more yellow and less red as in most references. Not sure the determination is OK.
Growing scattered, about 5 – 6 fruitbodies; pileus diameter from 6 to 8.5 cm, stipe up to 8.5 cm long; ; flesh whitish, bruising slowly with time, particularly at the base of the stipe; SP white (oac909), pilei strongly slimy, the layer of the mucus more than 1 mm thick.

Nikon D700 / Nikkor Micro 105mm/f2.8

Proposed Names

57% (1)
Eye3 Eyes3
Recognized by sight: very, very slimy !
Used references: (1) Personal communication with Mr. Bojan Rot, www.gobenabovskem.si .
(2) M. E. Noordeloos, Th. Kuyper, E. Vellinga (1999). Flora Agaricina Neerlandica: Critical Monographs on Families of Agarics and Boleti Occurring in the Netherlands. Taylor & Francis. p126. cited after http://en.wikipedia.org/wiki/Tricholoma_ustale
(3) G.J.Krieglsteiner (Hrsg.), Die Grosspilze Bade-Württembergs, Band 3, Ulmer (2001), p 539.
(4) R.M. Daehncke, 1200 Pilze in Farbfotos, AT Verlag (2009), p 236.
(5) R.Phillips, Mushrooms, Macmillan (2006), p 111.
(6) M.Bon, Parey’s Buch der Pilze, Kosmos (2005), p 158.
(7) http://healing-mushrooms.net/archives/tricholoma-ustale.html
Based on microscopic features:
Spores smooth, elliptical. Dimensions: 7.1 (SD = 0.4) x 5.4 (SD = 0.3) μ, Q = 1.31 (SD = 0.08), n = 28. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil, in water, AmScope MA500 digital camera.
Based on chemical features: Taste mushroomy, moderately bitter and burning, unpleasant; smell not strong, on earth (?).

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2013-07-28 10:33:13 CDT (-0400)
Last modified: 2013-07-28 10:35:49 CDT (-0400)
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