Habitat: edge of mixed wood, former pasture (> 50 years ago); Picea abies, Fagus sylvatica, Ostrya carprinifolia and Fraxinus ornus dominant trees¸ dominant in the ground vegetation Vinca minor and Helleborus niger; slightly southeast inclined mountain slope; calcareous ground, old overgrown slope scree, growing among roots of and under canopy of Picea abies, mostly in shade, relatively warm place, partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 6-9 deg C, elevation 595 m (1.950 feet), alpine phytogeographical region.

Substratum: soil covered by Picea abies needles and Ostrya carprinifolia rotting leaves.

Place: Lower Trenta valley, between villages Soča and Trenta, right bank of river Soča, near Trenta 2a cottage, East Julian Alps, Posočje, Slovenia EC

Comments: Perhaps it would be better to call this find Agaricus silvicola agg.. It is difficult to distinguish A. silvicola species from several similar species (Agaricus essettei, Agaricus abruptibulbus, Agaricus chionoderma, for example). Several authors, including Index Fungorum, consider (some of) these names as synonyms. To my knowledge taxonomy of this Agaricus has not yet settled.

Growing in two close groups consisting of about 10 sporocarps, pileus white (young sporocarps) to bright beige (oac900), diameter 6-10(13) cm, 5% HOH reaction of pileus surface pale yellow (oac858); almost no bruising yellow when handled; stipe up to 10 cm long, the same color as the hut surface; club-shaped but without conspicuous abrupt flattering at the base (Agaricus abruptibulbus); flesh white, firm; SP abundant, dark chocolate (oac858).

Species Lists


Proposed Names

61% (2)
Recognized by sight
Used references: (1) Personal communication with Mr. Bojan Rot,
(2) D. Arora, Mushrooms Demystified, Ten Speed Press, Berkeley (1986), p 334.
(3) G.J. Krieglsteiner (Hrsg.), Die Grosspilze Baden-Württembergs, Band 5., Ulmer (2003), p 526.
(4) M. Bon, Parey’s Buch der Pilze, Kosmos (2005), p 278.
(5) S. Buczacki, Collins Fungi Guide, Collins (2012), p 46.
(6) A. Poler, Veselo po gobe (in Slovene), Mohorjeva družba Celovec (2002).
Based on microscopic features: Spores smooth. Dimensions: 5,4 [5,9 ; 6,1] 6,6 × 3,3 [3,6 ; 3,7] 4 μ; Q = 1,5 [1,6 ; 1,7] 1,8; N = 35; C = 95%; Me = 6 × 3,6 μ; Qe = 1,6. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil, in water. AmScope MA500 digital camera.
Based on chemical features: Taste mild, pleasant; smell faintly, unconvincingly on anise (?).

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