Zs. P. Komáromy szerk.: Studia Botanica Hungarica 16. 1982 (Budapest, 1982)

Bohus, Gábor: Some results of systematical and ecological research on Agaricales, IX.

ín each individual. Since the weather was vapory considerable part of the fungi growing in mass reached a relatively large size so the similarity to Agaricus xanthodermus was even more conspicuous. A typo differt: Caro in basi stipitis ± citrinolutea. Cuticula pilei saepe radialiter diffractus. Typus: 67844, in Herbario Musei Hist.-nat.Hung., Budapest. Sárszentágota, com. Tolna, in pascuo, 18 Sept. 1980, leg.: Bohus - Lendvay. Pileus 6-12 cm; semiglobate then expanded; white, whitish or light ochre; first silky then breaking into scales, often radially cracked; at margin not rarely dentate from veil. Gills rather rarely rosy; edge fertile. Stem 4-6 x 0.8-1.2 cm; attenuated downwards; first with a rich floccose veil; white, at the base yellowing when touched. Ring at least small. Flesh whitish, in the base lemon-yellow or lemon-yellowish. Smell null. Spores ellipsoid, short ellipsoid; 7-7.5 x 4.7-5.2 jum. Gregarious in moderately saline meadows. Hebeloma subcaespitosum Bon var, psammocolum (Bohus) Bohus comb.n. Basonym: H. psammocolum Bohus: Hebeloma Studies, II. - Ann.Hist.-nat.

Mus.Natl. Hung.

, 70 (1078), p. 103, Fig. 4. In the course of an intensive research carried on recently by M. BABOS on the fungus flora of sandy areas in Hungary, rich H. versipelle ss. Konrád & Maublanc = H. subcaespitosum Bon material and several H. psammocolum Bohus specimens could be collected. While studying these, it turned out that the big sand tubercle - which is one of the characteristic features of H, psammocolum - can to a lesser or greater extent be seen also on certain H. subcaespitosum specimens. The other difference, the cylindrical marginal cells among contra lageniform cells, also disappeared. During microscopic examinations it turned out that both forms of marginal cells occur. Cylindrical marginal cells can be found on the gill edge of certain specimens in great number, they occur in other specimens only in small number. A typo differt: Stipes basi cum bulbo ex arena non raro magno. Cortinarius rigentoides Bohus nom.n. Basonym: C

. pseudorigens Bohus: Interessantere Corttnarius-Arten aus dem Karpaten-Becken, III. - Ann,Hist.-nat.Mus.Natl.Hung., 68 (1976), p. 54-56, Fig. 4. It escaped the attention, that R. Henry used the name "pseudorigens" in 1969. II. The effect of sodium sulphate on Agaricus species living in saline soils The easily soluble sodium salts (sodium cloride, sodium sulphate and sodium carbonate), which spoil the clayey structure in alkali soil, causing thereby that the soil becomes more or less barren, on the other hand they have a toxic effect on plants if they occur in greater conFig. 1. Tricholoma nodulosporum Babos & Bohus sp.n. - Fruit bodies ( 3/4 nat. size ) Photo: Z. Sarkadi

. Fig. 2. Tricholoma nodulosporum Babos & Bohus sp.n. - Spores, Scanning electron micrograph by Mrs. I. Gondár.