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

Szurdoki, Erzsébet: Peat mosses of North Hungary

Though unpublished, this species was earlier collected from Nagy-Mohos (SZURDOKI et al. in press) and Nyírjes-tó, Báb-tava and Nyíres-tó (recent revision of specimens of the Bryophyte Herbarium of BP). Presently it lives in Mohos lakes (LÁJER 1998, SZURDOKI et al. in press), in the Zemplén Mts (SZURDOKI et al. 2000), Báb-tava and Nyíres-tó (LÁJER 1998, collections of Szurdoki from 1994, 1999, 2000) (Table 1). Except for the small patch in the Zemplén Mts, all habitats of S. flexuosum is acidic and relatively poor in nutrients, it lives in various associations of bogs (Eriophoro angustifolii-Sphagnetum, Sphagno flexuosi-Eriophoretum angustifolii, Eriophoro vaginati-Sphagnetum recurvi, Betulo pubescentisSphagnetum). Except for Nyíres-tó, all occurrences represent relatively small populations. In the field, S. fallax, S. angustifolium and S. flexuosum are hardly distinguished from each other, thus it is very difficult to establish their distribution in mires or even in associations. LÁJER (1988) has published numerous occurrences from the western part of the country from fen communities. S. flexuosum is still relatively rare in North Hungary, but the populations do not appear threatened or endangered. Section Rigida This is a relatively small section, represented in Europe by two species (S. compactum and S. strictum), of which only S. compactum occurs in Hungary. These are robust but low growing plants. In some respect they resemble those of section Sphagnum, but the species of that section have large stem leaves while members of section Rigida have small ones. Sphagnum compactum DC. in Lamarc and De Candolle This is a robust and very low growing plant. It forms very dense cushions or compact mats. The colour of plant is whitish-green and sometimes brownish. It has small capitula, which usually concealed by the branches (DANIELS and EDDY 1985). The very small stem leaves distinguish it from S. palustre, which also has low growing form in drier places in Hungary. S. compactum has only a few small populations in Hungary, beside the ones North Hungary it lives in the mire of Kőszeg (Alsó-erdő, SZÖVÉNYI 1998), while it seems to have disappeared from the Vendvidék (SZURDOKI 1996, ÓDOR et al. 1996). In North Hungary, in the Zemplén Mts SZURDOKI et al. (2000) reported the occurrence of S. compactum from "Borzás-oldal" (in the Komlóska-völgy). The