Observation 81608: Xanthoporia radiata (Sowerby) Ţura, Zmitr., Wasser, Raats & Nevo

When: 2011-10-27

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

46.33122°N 13.52793°E

Who: amadej trnkoczy (amadej)

Specimen available

Code: Bot_566/2011_IMG7241

Habitat: Mixed wood side, rich mixture of Fagus sylvatica, Picea abies, Alnus incana, Ostrya carpinifolia, Corylus avellana, etc.; W inclined hill slope, cretaceous clastic rock (flysh) bedrock, half shade, partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 8-10 deg C, elevation 425 m (1.400 feet), alpine phytogeographical region.

Substratum: dead but still standing trunk of a small Alnus incana.

Place: Bovec basin, W of station A of Mt. Kanin cable car, East Julian Alps, Posočje, Slovenia EC

Comments: Growing in a large group. Cap dimensions up to 7 cm (3 inch) long, 3,5 cm (1.4 inch) wide and 3 cm (1.2 inch) thick. Flesh corky, moist, relatively soft and easy to cut. Upper surface of vivid colors: golden-brown (oac755 -oac713), ocher brown (oac803), red (oac670). Pore surface brown (oac708) with silvery-gray flesh. SP faint, yellowish (?). Very vivid colors of the cups’ upper surface faded to more or less brown in 12 hours after cut off.

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

Species Lists


Vivid colors of the cups’ upper side faded to more or less brown in 12 hours after they were cut off.

Proposed Names

57% (1)
Recognized by sight
Used references: (1) A.Bernicchia, Polyporaceae s.l., Edizioni Candusso (2005), p 284.
(2) R.Phillips, Mushrooms, Macmillan (2006), p 310.
(3) http://www.mushroomexpert.com/inonotus_radiatus.html .
(4) M.Bon, Parey’s Buch der Pilze, Kosmos (2005), p 320.
(5) Personal communication with Mr. Bojan Rot.
Based on microscopic features: Spores smooth, dimensions: 5.8 (SD = 0.5) x 3.8 (SD = 0.3) micr., Q = 1.55 (SD = 0.12), n = 30. Large fusoid hymenial setae scattered. Motic B2-211A, magnification 1.000 x, oil (spores) and 400 x (setae) in water.
Based on chemical features: Trama instantly goes black in 5% KOH. Smell indistinctive.

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= Observer’s choice
= Current consensus


Add Comment
in its peak colors
By: amadej trnkoczy (amadej)
2011-11-08 22:45:46 CET (+0100)

Thank you Darvin. It was really a nice fund. One can see here and there (not too often in my region) dark brown or black, more or less decomposed dead huts of this species, but one has to have luck to find it in its peak colors. This one is close to my home and I am now following how it develops.

By: Darvin DeShazer (darv)
2011-11-08 02:20:30 CET (+0100)

Another great post from amadej! I really like the references and microshots. Nicely done.

Created: 2011-11-07 09:49:44 CET (+0100)
Last modified: 2014-12-02 14:34:48 CET (+0100)
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