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

Mycocoenological survey data (Bohus&Babos 1958) : In the course of coenological surveys, it was found in the following associations, that is, forest types, in the Western Transdanubium : Pineto-Quercetum, Querceto petraeae-Carpinetum mediostiriacum luzuletosum ; in the area of the Hungarian Central Mountains : Luzulo-Quercetum subcarpaticum, Luzulo-Quercetum subcarpaticum myrtilletosum, Luzulo-Quercetum subcarpaticum Dicranum facies, Querceto petraeaeCarpinetum pannonicum caricetosum pilosae, Potentillo-Quercetum (petraea, cerris) pannonicum, Potentillo-Quercetum (petraea, cerris) pannonicum poetosum nemoralis, Potentillo-Quercetum (petraea, cerris) pannonicum Cladonia facies, Fagetum silvaticae subcarpaticum, Fageto-Ornetum hungaricum and in a transitional beech stock. Russula lutea Fr. ex Huds. ssp. roseipes (Bres.) n. c. Several authors have treated this species, found in few localities as yet. Finally, Schaeffer published its description based on B r e s a d o 1 a's, adding, as a separate statement, the opinions of Melzer — Z vára and Singe r, (since he was not sure whether all three authors treated the same species). On the basis of the materials collected in the Mts. Buda, we could establish the followings : the color of the cap agrees with Bresadol a's description, that is, with the hue given on the colored plate. The cuticle of the cap can almost complet elv be pulled off, it may extend over the edge of the cap, indeed, it may become sulcate later, as stated by Melzer — Z v á r a. The yellowish color of the gills is suffused with pink (according to Melzer — Zvára, the edge of the gills may also be red) ; the stem is partly flushed with pink. Its shape is exactly' like the figure given by Bresadola (as compared to the diameter of the cap, thicker than in the case of R. lutea). The flesh turns lilaceous wine red with the phenol reaction, agreeing with the statement of Melzer — Zvára. The pattern of the spores conforms with 2d, 2b, 6a, 6b (Schaeffe r's spore table, 1952). There are no cuticular cystids either on the cap or on the stem, but normal hyphae, not staining with SV, as observed also by Schaeffer on Bresadol a's original exsiccatum. Concerning its habit and some other features, the species stands near, in conformity with S i n g e r's findings, to the alutacea group too. (cf. G. B o h u s's paper on his material collected in Czechoslovakia : Russula-Forschungen, Borbásia Nova, 13, 1943, p. 8). Herb. : in silva mixta, 26 June 1959, Mt. Csúcshegy, Mts. Buda, leg. Babos. Russula luteotacta Rea Generally

7 infrequent in Europe, locally frequent in England and France, rather common and frequent in Hungary. The copious research material afforded the possibility- to study further the rate of variability of this species, as also its delimitation toward R. rubicunda. With regard to variation, it could be established that though the characteristical light red and vivid red colors are constant (they do not turn to purple red and vinous), thev show a high variability toward discoloration, paling to yellowish and whitish. The characteristical yellow of the gills and the stem is also fluctuating, depending to a high degree on weather conditions. Fruit-bodies, whose gills secrete drops, will turn to a deep vellow due to the effects of wet weather or a moist microclimate. On the other hand, specimens developed in dry weather or in drv microclimatic conditions (and often with rivuloso-