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 1. Proportion of geographic distribution types among the 274 vascular species Distribution type Species number Percent of species Eurasian 116 42.3 Cosmopolitan 44 16.1 Circumboreal 32 11.7 European 25 9.1 Adventive 13 4.7 Central European 10 3.6 Sub-Mediterranean 9 3.3 Continental 6 2.2 Pontic-Mediterranean 4 1.5 Pontic 3 1.1 Atlantic-Sub-Mediterranean 3 1.1 Pontic-Pannonic 2 0.7 Mediterranean 1 0.4 Eastern Sub-Mediterranean 1 0.4 Pannonic 1 0.4 Sub-Atlantic 1 0.4 Turanian 1 0.4 Balkan 1 0.4 Endemic 1 0.4 SUM 274 100 Glyceria maxima, G. plicata, Koeleria javorkae, Luzula campestris, Stellaria graminea, Carex stenophylla and Ficaria verna. Some revisions of the data published in STOLLMAYER-BONCZ (1982, 1993a, b) were made: — Achillea millefolium has been changed to Achillea collina; — Galium schultesii has been changed to Galium mollugo; — Seseli osseum has been changed to Seseli varium; — Juglans nigra has been eliminated from the list as accidental plant of economic value. As Table 1 shows, the relative frequency of geographic distribution types is in harmony with what the habitat suggests. Widely distributed species of the cool temperate zone dominate. There are hardly any southern or eastern species. The distribution of nature conservation ranks (Table 2) indicates high level of disturbance, since the proportion of disturbance tolerators and weeds exceeds 50%. This can be the result of the small size of the area and of the lack of any buffer zone around it. It is in direct contact with arable fields.