Ischnoderma-resinosum_7

Description:

Ischnoderma resinosum (Schrad.) P. Karst., syn.: Fomitopsis resinosa (Schrad.) Rauschert, Ischnoderma fuliginosum (Scop.) Murrill, Ungulina fuliginosa (Scop.) Pat.EN: Resinous Polypore, DE: Laubholz-HarzporlingSlo.: bukova irhovkaDat.: Dec. 3. 2018Lat.: 46.337198 Long.: 13.553608Code: Bot_1168/2018_DSC4494Habitat: cultivated grassland, city park; flat terrain; calcareous ground; partly sunny place; exposed to direct rain; average precipitations ~ 3.000 mm/year, average temperature 8-10 deg C, elevation 450 m (1.480 feet), alpine phytogeographical region.Substratum: dead Acer sp. (personal communication with a resident living next to the place) stump near its final stage of decomposition.Place: Bovec basin, city park in front of the hotel Kanin, East Julian Alps, Posoje, Slovenia EC.Comment: Ischnoderma resinosum is widely distributed and a common species in many regions. But it is a rare find in west Slovenia. This observation seems, at least according to available data from Boletus Informaticus database (Ref.: 8), the first one in Posoje region. Pilei are surprisingly soft for a polypore. When fresh they have very distinctive and pleasant smell resembling the smell of Gloeophyllum odoratum. However, this smell fades after some time and disappears completely in dry herbarium samples. It is interesting that young, but also large, seemingly mature pilei do not yet have hymenium developed and do not produce spores (Ref.: 6). In my first attempt I was trying to do microscopy of both in vain. Only after I went back to the site and bring home a very old, hard, almost decaying pileus I found plentiful spores.Many pilei were present; pilei semicircular to flabelliform, applanate, also effuse-reflexed and sometimes imbricate and confluent, measuring up to 15 x 9 cm, up to 2 cm thick; trama up to 15 mm thick, pore layer up to 10 mm thick; pilei soft; pores small, slightly bruising brownish; SP rather faint, light ocher, oac 847; 5% KOH reaction on pileus almost black with deep purple tint, on pores reddish-brown, on trama brown.Spores smooth. Dimensions: (4,3) 4,8 - 5,6 (5,9) (1,6) 1,8 - 2,2 (2,5) m; Q = (2,3) 2,34 - 2,8 (3,1); N = 40; Me = 5,2 2 m; Qe = 2,6. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil; in water, fresh material. AmScope MA500 digital camera.Herbarium: Index Herbariorum LJF @ Mycotheca and lichen herbarium of Slovenian Forestry Institute.Ref.: (1) Leg. and personal communication with Mr. Bojan Rot, www. gobenabovskem.si (2) www.mushroomexpert.com/ischnoderma_resinosum.html (accessed Dec 13. 2018) (3) D. Arora, Mushrooms Demystified, Ten Speed Press, Berkeley (1986), p 573. (4) A. Bernicchia, Polyporaceaes l., Fungi Europaei, Vol. 10., Edizioni Candusso (2005), p 300. (5) L. Ryvarden, I. Melo, Poroid fungi of Europe, Synopsis Fungorum 31., Fungiflora (2014), p 240. (6) G.J. Krieglsteiner (Hrsg.), Die Grosspilze Baden-Wrttembergs, Band 1., Ulmer (2000), p 537.(7) www.mycoquebec.org/bas.php?trie=I&l=l&nom=Ischnod... (accessed Dec.15.2018) (8) N. Ogris (ed), Boletus informaticus, Slovenian Forestry Institute www.zdravgozd.si/bi_index.aspx (accessed Dec. 15. 2018)