Xerocomus-chrysenteron_1M

Description:

Xerocomus chrysenteronRed Cracking Bolete, DE: Echter RotfussrhrlingSlo.: rdeebetna polstenkaDat.: Oct. 09. 2013Lat.: 46.39815 Long.: 13.70048Code: Bot_759/2013_DSC8543Habitat: Mixed forest, Picea abies and Fagus sylvatica dominant, almost flat terrain, on overgrown alluvial deposits, calcareous ground; full shade, humid place, partly protected from direct rain by tree canopies; average precipitations ~ 3.000 mm/year, average temperature 4-6 deg C, elevation 1.000 m (3.300 feet), alpine phytogeographical region.Substratum: on lightly overgrown soil under Picea abies near its roots.Place: Zadnja Trenta valley, left bank of (mostly) dry Soa river bed, north of Bavki Grintavec mountain, East Julian Alps, Posoje, Slovenia EC Comments: This very beautiful mushroom was growing solitary; pileus diameter 9 cm; taste and smells faint; SP faint, brown, oac839. No typical red cracks on pileus surface observed. This species is considered very variable. Red stipe and cracked pileus surface with red context seen in the cracks seem to be two most distinctive traits of this bolete, however, they may also be totally absent.Spores smooth. Dimensions: 16.0 (SD= 1.3) x 5.1 (SD= 0.3) , Q= 3.1 (SD= 0.2), n= 30. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil, in water. AmScope MA500 digital camera.Herbarium: Mycotheca and lichen herbarium (LJU-Li) of Slovenian Forestry Institute, Vena pot 2, Ljubljana, Index Herbariorum LJFRef.:(1) G. Kibby, British Boletes, Copyright Geoffrey Kibby (2011), p 47. (2) R.M. Daehncke, 1200 Pilze in Farbfotos, AT Verlag (2009), p 46. (3) R. Lueder, Grundkurs Pilzbestimmung, Quelle & Meyer (2008), p 163. (4) M. Bon, Parey's Buch der Pilze, Kosmos (2005), p 42. (5) S. Buczacki, Collins Fungi Guide, Collins (2012), p 396. (6) Personal communication with Mr. Bojan Rot, www.gobenabovskem.com