Image de Russula nana Killerm. 1939

Description :

Slo.: alpska golobica? - Habitat: upland grassland above tree-line, with dwarf Salix sp. species, on a mountain ridge, slightly north inclined slope, full sun, fully exposed to precipitations, a windy place, precipitations ~ 3.000 mm/year, average temperature 1 - 3 deg C, elevation 2.100 m (6.900 feet), alpine phytogeographical region. - Substratum: soil. - Comments: Determination not certain. Spore dimensions: 8,5 (SD=0.8) x 6,7 (SD=0.5) micr., Q= 1.26 (SD=0.08), n=33. Motic B2-211A, magnification 400 x, in water. Could also be Russula norvegica (var. with red pileus). Pileus had a diameter of about 4-5 cm (2 inch), which is a little bit too large, both for R. nana ad well as for R.norvegica. Mycorrhiza possibly with dwarf willows (Salix herbacea, Salix retusa, Salix serpillifolia), Dryas octopetala, Bistrota vivipara? Found well above tree line. - Ref.: (1) Personal communication with Mr. Gregor Podgornik, NAC (Natural History Center), Tolmin, Slovenia EC. (2) http://rbg-web2.rbge.org.uk/willow/Gallery/Mycology/gallery_mycology.htm .(3) http://www.floraislands.is/cappic.htm (4) http://www.geograph.org.uk/photo/1132142%20R.%20nana . (5) http://www.mtsn.tn.it/russulales-news/in_ecology.asp