Image of Biscogniauxia nummularia (Bull.) Kuntze 1891

Description:

Slo.: noviasta skorjederka - mixed wood, Fagus sylvatica, Picea abies and Ostrya carpinifolia dominant trees; steep mountain slope, south aspect; shallow, skeletal, calcareous ground; dry and sunny place; exposed to direct rain; average precipitations ~ 3.000 mm/year, average temperature 6-8 deg C, elevation 880 m (2.900 feet), alpine phytogeographical region. Substratum: dead, rotten but still standing Fagus sylvatica trunk and branches mostly still in bark. Comments: Biscogniauxia nummularia is a common fungus in beech and mixed woods of the Upper Soa River region. It can be recognized by more or less round, but many times also confluent and irregular shape, (almost) black spots on rotting trunks and fallen branches of Fagus sylvatica. Spots are flat, not cushion like. Ostioles are rather small and inconspicuous. Spots of this observation were from about 5 mm in diameter to 10 x 2.5 cm large patches and about 1 mm thick. Perithecia have in average 0.7 x 0.55 mm in diameter. Spores smooth, dark. Dimensions: 10,5 [12,1 ; 12,8] 14,4 x 6,4 [7,3 ; 7,8] 8,7 microns; Q = 1,3 [1,6 ; 1,7] 2; N = 25; C = 95%; Me = 12,4 x 7,5 microns; Qe = 1,7. Perithecia dimensions: 592.3 [681.9 ; 744.4] 834.1 x 373.4 [514.6 ; 613] 754.3 microns; Q = 0.9 [1.2 ; 1.4] 1.7; N = 15; C = 95%; Me = 713.2 x 563.8 microns; Qe = 1.3.Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil, in water, fresh material. AmScope MA500 digital camera. Herbarium: Mycotheca and lichen herbarium (LJU-Li) of Slovenian Forestry Institute, Vena pot 2, Ljubljana, Index Herbariorum LJF Ref.: (1) J. Breitenbach, F. Kraenzlin, Eds., Fungi of Switzerland, Vol.1. Verlag Mykologia (1984), p 270. SP 11-14/7-10 (2) R. Phillips, Mushrooms, Macmillan (2006), p 376. SP 11-14/7-10 (3) L. Hagar, Ottova Encyklopedia Hb, Ottova Nakladatelstvi, Praha (2015) (in Slovakian), p 129.