Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 66. (Budapest 1974)

Bohus, G.: Agaricus studies, IV.

Fig. 1. Agaricus pilatianus sp. n., marginal cystidia and spores (right) — Budapest, Pasaréti út, 3 Sept. 1972, leg. J. BOHUS. - Alsógöd (Com. Pest), in garden, 31 May 1962, leg. HAMBALKÓ. - Dunaharaszti (Com. Pest), 6 June 1969, leg.?. — Veszprém (Com. Veszprém), in park, 27 June 19.62, leg. G. BOHUS. - Tokod (Com. Komárom), in wood impregnating plant, 8 May 1972, leg. GYARMATI. The variability of the species, including the f. silvaticoides and f. magnus, as far as the colour and the squamosity of the pileus are concerned is so great that the extreme forms do not seem to belong to one species. One of the extremities is f. silvaticoides much resembling A. silvaticus and A. haemorrhoidarius, in which the pileus at first is entirely light brown or greyish brown and of a fibrillose structure, later squamulose on a lighter ground. The other extreme form is f. magnus, of a great size with thick flesh, with a pileus at first entirely brownish grey, soon breaking up on a lighter ground darker fibrillose-squamose. A further extremity may have a white pileus later with a finely fibrillose structure. During preparation, the white colour of the pileus turns into ochre rusty or rusty (though not always), at A. xanthodermus to dirty isabel-coloured. Agaricus pilatianus f. magnus f. n. Differing from the type in the following characters: pileus 13—18 cm in diam. ; at first entirely brownish grey. It is like an A. pseudopratensis but much larger, also resembling A. iodosmus, but with an other smell. A typo differt: Pileus 13—18 cm diam., primum omnino brunneolo-griseus.