B. Papp szerk.: Studia Botanica Hungarica 38. 2007 (Budapest, 2007)

Szollát, György, Seregélyes, Tibor, S. Csomós, Ágnes; Standovár, Tibor: The flora and vegetation of Gödi Láprét near Göd, Pest county, Hungary

caespitosa is an abundant and constant component of the purple moorgrass meadow beds too, becoming more frequent or even dominant in the disturbed or dryer parts of the meadows. On waterlogged soils certain sedge species - Carex acutiformis, Carex flacca and Carex panicea - are abundant or even dominant with the subdominance of Molinia coerulea subsp. arundinacea. Of the typical purple moorgrass meadow species Succisa pratensis and Sanguisorba officinalis are abundant, Selinum carvifolia and Valeriana dioica are relatively frequent, as well as Gentianapneumonanthe, Veratrum album, Iris sibirica of the generally rare species, while Allium angulosum occurs at one site. Of the rich fen species funcus subnodulosus is one of the most abundant (subdominant or codominant in some sites) components of the purple moorgrass meadows in the survey area, with Epipactis palustris (frequent), Carex davalliana and Carex hostiana (occasional), Eriophorum angustifolium and E. latifolium (sporadical). Shown by earlier records (SZOLLÁT et al. 1992) Parnassia palustris used to be frequent before 1992. Some species of the mesophilous meadows, like Cirsium canum, Genista tinctoria and Serratula tinctoria are common in this vegetation type together with Briza media and Pulicaria dysentherica in certain sites. Phytosociologically more or less indifferent accompanying species, characteristic to the purple moorgrass meadows in the area, are as follows: funcus articulatus, Lysimachia vulgaris, Tetragonolobus maritimus subsp. siliquosus, Potentilla erecta, Angelica sylvestris, Mentha aquatica, Vicia cracca, Centaurea pannonica, Lythrum salicaria, Eupatorium cannabinum and Agrostis stolonifera. In the wettest sites Potentilla erecta, Carex acutiformis and funcus inflexus are common, as well as Carex elata at some spots. In the dryer parts of the purple moorgrass meadows, usually on the border with the steppes, Galium verum, Leontodon hispidus and Plantago media are common among other less specialised species together with Ononis spinosa as a consequence of grazing in the past. The majority of the purple moorgrass meadows are of undisturbed structure and are in semi-natural state, where Molinia coerulea subsp. arundinacea forms 1.5 m high stands at maturity. However, some aggressively spreading species, like Phragmites australis, Cladium mariscus, Solidago canadensis and Calamagrostis epigeios have begun invading these areas, partly because of discontinued scything. For the same reasons Salix rosmarinifolia (0.5-1 m tall) and Salix cinerea (1-2 m tall) started to spread in certain sites, which also demonstrates the trend of succession. Transitional grasslands between the purple moorgrass meadow and sand meadow-steppe plant communities Though the species composition of the transitional zones (of varying width) surrounding the purple moorgrass meadow beds is not uniform, the dominant species are present in a more or less constant combination. The transitional environmental conditions are also manifested in the virulence of the plant populations living here, as the majority of the plant individuals are of vegetative stage or even rudimentary, due to the ecological parameters far poorer than optimal. The characteristic and abundant species of this transi-