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

Szurdoki, Erzsébet: Peat mosses of North Hungary

the adaxial surface, but it only after strong staining can be visible. In the lower lateral part of the branch leaves have numerous small (2 pm) pores in the mid-line of hyaline cells. The photosynthetic cells of stem leaves are triangular in cross section, and they are widely exposed on the abaxial and only shallowly on the adaxial surface (DANIELS and EDDY 1985). In Hungary it is rare. It lives in bogs, intermediate mires and sometimes fens. S. obtusum is also infrequent in North Hungary (Table 1). Earlier (before the 1990s) it was published from Nyírjes-tó (BAKALÁR 1981) and Kis-tó (BOROS and VAJDA I960). In 1994 the author collected it from Nyíres-tó and Nyírjes-tó, but could not find it again. VOJTKÓ and MARSCHALL ( 1991 ) published the occurrence of S. obtusum from Kis-tó in the early 1990s, but subsequent search by the author in 1994 was unsuccessful. 5". obtusum has another occurrence in the Zemplén Mts, where it lives in a waterlogged place near Köves-patak (SZURDOKI et al. 2000). The survival of S. obtusum in North Hungary is very doubtful. The small patch in the Zemplén Mts is threatened. Its presence in Nyíres-tó and Nyírjes-tó is possible, but presumably in very small amounts. Additionally, it has fewer and fewer occurrences in the whole territory of Hungary. On the basis of ORBÁN and VAJDA ( 1983) it lived in numerous places, but the presence records reflect a strong decrease of the species. Sphagnum fallax (Klinggr.) Klinggr. This is a medium-sized plant with pale green colour. The stem cortex is distinguishable. Stem leaves are mostly isosceles triangular shaped with acute apices. Branch leaves are clearly 5-ranked and the hyaline cells of pendent branch leaves have medium-sized pores (8-12 pm) on the abaxial surface (DANIELS and EDDY 1985). In Hungary it lives in bogs, intermediate mires and fens, and sometimes in willow or alder swamps. Relatively common peat moss species, which occurs in most regions, where Sphagna live in Hungary. Until the 1990s S. fallax was not recorded from Hungary, because most bryologists used the name Sphagnum recurvum s. I, The revision of the S. recurvum s. I. material of the Bryophyte Herbarium of BP resulted in the recognition of numerous S. fallax specimens from North Hungary (and of course from other parts of Hungary, too): Csömöri-tó, Nyírjes-tó, Nagy-Mohos and Nyíres-tó (Table 1). Recent records are from Nádas-tó, Nyírjes-tó, Mohos lakes, Zemplén Mts, Báb-tava and Nyíres-tó (Table 1). LÁJER (1998a) published the occurrence of S. fallax from Nádas-tó. The author has also made collection there (in 1997 with Peter Erzberger), but of the S.