B. Papp szerk.: Studia Botanica Hungarica 34. 2003 (Budapest, 2003)

Szurdoki, Erzsébet: Peat mosses of North Hungary

and S. denticulatum were not found in the past decades. Only 2 species live in North Hungary: S. subsecundum and S. contortum (Table 1). Sphagnum subsecundum Nees in Sturm It is a small to medium-sized, never robust plant, its colour is varied from green to orange. Stem is always deep brown coloured with 1 layer of hyaline cells. Triangular-lingulate stem leaves are small with few fibrils around the apex. Generally it prefers mesotrophic mires but sometimes lives under oligotrophic conditions (DANIELS and EDDY 1985). In Hungary it lives in intermediate mires, spring mires, fens and sometimes in willow swamps. It is relatively common in Hungary, occurring mainly in the western part of the country. Like in other parts of Europe, it prefers mesotrophic conditions. S. subsecundum has only a few records from North Hungary (Table 1). Earlier it was known from Nyírjes-tó (MÁTHÉ and KOVÁCS 1958, BOROS 1964, BAKALÁR 1981) and from Mohos lakes (SZURDOKI et al. in press). Presently it lives in the Zemplén Mts and in Zsid-tó. In Nyírjes-tó it lived in different communities from the edge of the bog to the central part (MÁTHÉ and KOVÁCS 1958, BAKALÁR 1981 ), but in the past decade it has disappeared. It was also collected from Mohos lakes by Zólyomi, but it is not clear from which bog of the two (see also SZURDOKI et al. in press, SZURDOKI and NAGY 2002). It had not been collected from there recently. In the Zemplén Mts one occurrence was found by SZURDOKI and her colleagues at the end of the 1990s, on a wet, Calamagrostis canescens dominated meadow. There are numerous S. subsecundum patches and also S. fallax and S. palustre in the 50 m

2-sized place (SZURDOKI et al, 2000). There is a new population from the Bereg Plain, too. In the small floating mire of Zsid-tó, a few patches of S. subsecundum were found under willow bushes by E. SZURDOKI and Z. TÓTH in 1999. This species was already rare in North Hungary in the first part of the 20th century, but all earlier known populations have disappeared and presently only two new, small populations exist there. There is a high probability of having S. subsecundum soon to be extinct from this region.