Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 89. (Budapest 1997)

Szollát, Gy., Stollmayer-Boncz, E. , Standovár, T. ; Kecskés, F.: Vegetation of the Réti-dűlő and Csömöri-tó (Hungary)

Table 3. Protected and threatened species with estimated population size Location Species Population size Status Réti-dűlő Dactylorhiza incarnata 10000-100000 Protected Epipactis palustris 100-1000 Protected Eriophorum latifolium 100-1000 Protected Koeleria javorkae 10-100 Protected Orchis laxiflora 10-100 Protected Parnassia palustris 1000-10000 Protected Csömöri-tó Lastrea thelypteris 1000-10000 Protected Epipactis palustris 1-10 Protected Réti-dűlő Carex appropinquata 10-100 Threatened Carex davalliana 1-10 Threatened Carex nigra 1—10 Threatened Carex paniculata 10-100 Threatened Schoenus nigricans 1-10 Threatened RESULTS AND DISCUSSION Vegetation map Vegetation map of the area is shown in Fig. 3. Below a short description of each category is given. 1 ) Reed swamp (Scirpo-Phragmitetum) This category comprises those patches that have been covered by dense reed for a long time and supposedly had much better water supply than nowadays. They, most probably, used to be covered by excess water. During our investigation there were no excess water. In most parts Phragmites australis is the only dominant. However, at the edges of the stands Carex gracilis or Carex acutiformis can be codominant. This community is typically species poor. The following species are characteristic: Calystegia sepium, Caltha palustris ssp. cornuta, Lythrum salicaria, Symphytum officinale and occasionally Carex paniculata. 2) Sedge tuft (Caricetum appropinquatae) This is the most valuable community in this area. The dominant of this association (Carex appropinquata) is a rare species that has been declining all over Hungary. In the Réti-dűlő this community forms a narrow (3 to 10 m) belt around mire willow scrub. Characteristic species are Carex acutiformis, C. paniculata, C. vulpina, Caltha palustris ssp. cornuta, Equisetum palustre, Phragmites australis, Angelica sylvestris, Lysimachia vulgaris, Cirsium canum, Sanguisorba officinalis, (cf. phytosociological relevé in Table 4)