Image of Rhodocollybia butyracea (Bull.) Lennox 1979

Description:

Slo.: altava korenovka - syn: Collybia asema (Fr.) Gillet, Collybia butyracea var. asema (Fr.) Cetto, Collybia butyracea (Bull.) P. Kumm. - Habitat: Mixed wood, Fagus sylvatica dominant; slightly inclined mountain slope, southeast aspect; stony, calcareous, colluvial ground, in shade, relatively warm place; partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 590 m (1.940 feet), alpine phytogeographical region. Substratum: forest soil, thick layer of rotten leaves of Fagus sylvatica. Comments: Growing in a group of more than ten pilei on about 2 m2 area; pilei diameter 25 - 50 mm; huts somewhat sticky, older ones hygrophanous, stipe 50 - 75 mm long, 7 - 11 mm in diameter at the base, slightly viscid, some curved at the base, some longitudinally twisted, hollow, +/- lightly longitudinally furrowed; taste mushroomy, slightly unpleasant after a while; smell nitrous; SP abundant, whitish-beige, oac851. Spores smooth. Dimensions: 5,6 [6,5 ; 6,9] 7,8 x 3 [3,4 ; 3,6] 4 microns; Q = 1,6 [1,9 ; 2] 2,2; N = 30; C = 95%; Me = 6,7 x 3,5 microns; Qe = 1,9. 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) http://www.nybg.org/bsci/res/col/rhodo.html#butyracea (2) J. Breitenbach, F. Kraenzlin, Eds., Fungi of Switzerland, Vol.3. Verlag Mykologia (1991), p 172. (3) M. Bon, Parey's Buch der Pilze, Kosmos (2005), p 178. (4) S. Buczacki, Collins Fungi Guide, Collins (2012), p 175. (5) R. Phillips, Mushrooms, Macmillan (2006), p 123.