Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 53. (Budapest 1961)

Bohus, G.: Psalliota studies. I.: Critical species, critical notes

Due to this extraordinary productivity, it was possible to gather several wagonloads in some years from the not too extensive neighbourhood of the village Bogyiszló. After the protracted winter flood in 1956, it occurred only sporadically, probably owing to the consequences ot the flood. In that year, it fructified only in artificially irrigated areas (wherein it was formerly introduced) and on the dam, and the situation was the same in 1957. In 1958, it appeared in paprika plantations, and in 1959 in irrigated areas. In 1960, many kilograms per day could be gathered, and it burst forth in woods where it had been unknown before. Similarly unfruitful periods in the last 50 years were the following ones : 1947-50, 1933-35, 1928-30, 1919-26, 1911-12. 3. Some data referring to Psalliota maskae Pilât A large-sized species of interesting oecology was found in masses in the environments of Szekszárd. Since, for a time, no traces of it could be found in literature, we recorded it as Psalliota imrehii*

. Later investigations shew Fig. 1 : Psalliota maskae Pilât, longitudinal section of young fruit body. that it is identical with Agaricus maskae, described by Pilât in 1954. As no further data were published since the description of the species and as Pilât had a very meagre material for his diagnosis, it seems worth while to discuss in details the material at hand. Cap (6) —10—20 cm in diameter. At first hemisphaerical, frequently more or less angular, but middle always flat or slightly impressed, later expanding yet generally convex with sunken center ; entirely flat only in old state. White, whitish, creamy, or possibly greyish white, rosy white, or center and scales greyish ochreous to greyish brownish (on white base) ; when handled, more or less yellowish, light yellow or unaltered mostly on next day ; after preparation by our method ochreous, ochreous yellow or unaltered. At first, and not seldom also later, smooth (but traces of breaking up into floccose scales visible under magnifying glass also at that time), frequently, however, shredding to scales or fibrillose scales at least partly ; scales from minute to roughly imbricate shape, with also rim-like scales extending to several centimeters ; breaking * The dedication was to honour gymnasium-teacher L. 1 m r e h in Szekszárd, who observed the oecology of this species for 35 continuous years, kindly putting his observations at my disposal.