B. Papp szerk.: Studia Botanica Hungarica 30-31. 1999-2000 (Budapest, 2000)

Vasas, Gizella: Contributions to the knowledge of macrofungi of the forests along the Fekete-Körös, SE Hungary

appeared in great abundance in the Mályvád forest, in dense nettle stands on nitrogen-rich soil. A. phaeolepidotus is also rare in Hungary (altogether, 4 records are known; Babos 1989), yet it was also abundant in the Mályvád forest in 1998. Several fairy rings of the otherwise rare A. bohusii were found in the Mályvád forest (Doboz 13B, Gyula 87B). Twelve groups of 8-10 fruitbodies were observed in one of the rings (Doboz 13B, 9 September, 1998). To date, only two specimens of A. lanipes were recorded from Hungary (Buda Mts; BABOS 1989), but one specimen was also collected in the Mályvád forest (Gyula 33A) in 1998. A new Agaricus species was discovered on 27 April, 1998 in the Mályvád forest (Gyula 33A) and in the Sarkad-Remete forest (Sarkad 34C), and subsequently described as A. annulospecialis Bonus, Locsm. et Vasas (BOHUS et al. 2000). Several groups of fruitbodies of various developmental stages were observed and collected in the locations mentioned. Young specimens are characterised by a horizontally rimmed ring structure, which is changing in older specimens. When the fibrous, weak, outer (general) veil separated from the margin of the cap, a loose, pendent ring is formed. After rubbing or 1-2 hours of storage, the white skin of the fruitbodies turns to yellowish (later rusty yellowish), which is typical of the section Arvenses, especially the subsection Silvicolae (BOHUS 1995). Two species (i.e. Leucoagaricus ionidicolor (Gyula 33A), and Russula cicatricata (Gyula 7IB, 85A)), new records for Hungary, were also found in the Mályvád forest. In the young planted forest stands along the Fekete-Körös only very few saprophytic fungi are growing. In the spring no any fungus species occur here due to the dense, tall herb layer (dominated mainly Urtica dioica and Galium aparine), while nitrophilous, saprophytic species do appear in the autumn. In the middle-aged forest stands the species number of the macrofungi is much higher, but naturally the highest numbers of fungi appear only in the oldest, more natural stands. Among these, certain parts of the Mályvád forest proved to be the best biotops for fungi, especially the "Gyula 33 A" stand as a flood area of the dead arm Holt-Körös. The above results also confirm that the mature forests of this area have an interesting, characteristic macrofungus flora, which invites for further studies. ENUMERATION The following monographs were used for identifications: CAPELLI (1984) for Agaricus, CANDUSSO and LANZONI ( 1990) for Lepiota, GALLI ( 1996) for Russula