Boros István (szerk.): A Magyar Természettudományi Múzeum évkönyve 52. (Budapest 1960)
Bohus, G. ; Babos, M.: Notes on the occurrence in Hungary of Russula species, with regard to their range in Europe
the young specimens and in chiefly the gills ; the pallid creamy or sometimes darker creamy or pale ochre spore powder (the gills are pale, then creamy, frequently cream yellow or with a yellowish reflex color) ; the usually small (7—8 p) spores, punctate, with more or less anastomosis. The majority of the other characters of R. grisea represent varying features, according to varieties (e. g. cap color, dermatocystids of stem), or within the single variety itself. P. K o n r a d and A. Maublanc (1952, Les Agaricales, IL, p. 42—43), having listed R. anatina Romagn., R. subcompacta Britz., R.ferreri Sing., R. hibbardiae Burlingh behind R. grisea Gill., raise the possibility that these are maybe only forms of R. grisea. The Formenkreis of the Hungarian materials : The typical form, of the following color combinations, was present in mainly the area of the Mts. Bükk : cap greyish (dirtv) blue, lilac-blue, light lilac, lilaceous rosy, greyish lilac, or partly greenish-olive greenish ; gills creamy ; stem eventually more or less flushed to lilaceous (partly of a color combination and habit resembling R. cyanoxantha (grisea var. ionochlora Romagn.). Var. rosea : There was an unicolorous, greyish-pink form with pale gills in the Mts. Zemplén (of a color resembling R. heterophylia var. vesca, but rather with a R. cyanoxantha habit). Var. pruinatoglauca : A pruinose-blue form, turning to a strong brown when drying, fructified also in the Mts. Zemplén. Var. basifurcata : The form, conforming more or less with R. basifurcata, fructifies mainly in the Mts. Pilis, frequently on the margins of the woods ; it displays pale, sometimes hardly definable hues ; the color is more or less dirty incarnate to pale lilaceous on a more or less ochreous base ; it sometimes has the aspect as if it had strongly discolored ; again, it may be partly yellowish olive partly also greenish. The cap is rarely circular, mostly irregular. Dermatocystids absent. Var. pinicola : The generally more stocky form (suggesting R. parazurea ) fructifies mainly under pine trees. Its cap is usually circular (regular), slate-blue, slate-grey, greyish pinkish, lilaceous grey, partly ochreous or also greyish green. Its stem is usually short ; gills creamy. Var. viridis : Cap greyish green or greyish-bluish green, green. The stem may also be slightly flushed to rosy-lilaceous (but then the rosy lilac color is absent from the cap). This form resembles R. heterophylia, and the greenish ft. cyanoxantha. Var. albida : Cap whitish, in some specimens with a slightly greyish-rose tint in the middle. Differ from R. galochroa Fr. ss. Romagn. in its pale gills. Var. subcompacta Britz, ss. Kühn. & Romagn. : Seems to be a Xanthospora. Gills yellow-ochre ; spore powder yellow-ochre clear ; cap greyish-greenish-bluish. The connections to the several biocoenoses of R. grisea, that is, its forms, could not be established yet. Horb.: in silva, 1 Sept. 1949, around Sopron, leg. Bohus&Lenky; in the Mts. Pilis : 22 June 1952, Mt. Kőhegy, leg. Bohus; in the Mts. Bükk : in Querceto petraeae-Carpinetum pannonicum caricetosum pilosae, 15 July 1955, 11 July 1956, 1 August 1957, Mt. Samassahegy, leg. Bohus&Babos; in Querceto petraeae-Carpinetum pannonicum corydaletosum, 10 August 1957, Mt. Samassahegy, leg. Bohus&Babos; in Luzulo-Quercetum subcarpaticum, 2 July 1956, Mt. Samassahegy, leg. Babos; in silva frondosa, 12, 15 July 1955, 1 August 1957, Mt. Samassahegy, leg. Bohus&Babos. var. rosea : in the Mts. Zemplén : in Querceto petraeae-Carpinetum pannonicum 16 July 1958, Kishuta, leg. Bohus & Babos; in pineto mixto, 17—-18 Sept. 1958, Mt. Nagykerekhegy, leg. Bohus&Babos.
