Zs. K. Komáromy szerk.: Studia Botanica Hungarica 17. 1984 (Budapest, 1984)

Szujkó-Lacza, Júlia: The flora of the Kerecsendi berek forest

fragment the main road of the forest. The roads of the forest were opened along almost four hundred years ago. Both communities originate from the boréale period (9600-7300), most probably after the postglacial age (cf. JÁRAI-KOMLÓDI 1968, 1969). Forest-steppe-forest and continental dry steppe exist in SW Russia over vast region and the floristical elements of these areas reach also the margin of the Great Hungarian Plain and become components of the various communities here. The identical or equivalent species between the SW Russia forest-steppe and steppe and the Kerecsendi berek forest were shown by SZUJKÓ-LACZA & RAJCZY (I.e.), as based on DOHMAN'

s publication (1968) and their coenological investigation. The continental species of the forest-steppe forest and steppes also migrated to the southern slope of the Hungarian Central Mountain (JÁRAI-KOMLÓDI I.e.), and mixed there with the relict and endemic steppe and other elements. This migration took place between the Hungarian Central Mountain and the Great Hungarian Plain (KERNER 1863), (BORBÁS 1900). Knowledge of these floral and vegetational exchanges in general (cf. JÁRAI-KOMLÓDI I.e.) and the question of inner migration of various species in the Carpathian Basin promted me study the flora of the Kerecsendi berek forest. Moreover, arise the questions: The area has been strictly protected for twenty-five years and the species and communities published by ZÓLYOMI (1957) remained the same or disappeared due to disturbance from man, e.g. effectiveness of the protection. The check-list presented here also includes some communities exist in fragmentary form a smal abandoned area deforested today, and somewhat greater area around Kerecsend. The behaviour of the species in this area as regard the subtle ecological differences is reflected by the occurrence of these e.g. in forest, margin and road of forest etc that is the distribution of the species in the different micro-habitats. Frequency distribution of the species by the type of areageography (flora element) and lifeform are also presented here. Further I consider the degree of similarity between the Kerecsendi berek forest and the Bükk mountains sensu stricto the Bükk National Park (BNP) in view of the neighbouring geographical location of these regions. Answer to this last question may be given after five or six yearse of study. MATERIAL AND METHODS During the year 1981, from 3 April we collected and recorded the species almost every fortnight in the forest Aceri tatarico-Quercetum, the margin and roads of this forest, in steppe spots e.g. Salvio (nutanti-nemorosae)-Festucetum rupicolae, in Fraxino pannonicae-Ulmetum, in Prunetum spinosae, in Polygonato (latifoliae)-Carpinetum and the abandoned deforested area behind the forest. The specimens are deposited in the Herbarium of the Botanical Department of the Hungarian Natural History Museum, Budapest (BP). Data of specimens collected by previous collectors in the vicinity of Kerecsend, e.g. Kál or Kálkápolna, Verpelét and Vép and also housed in the Herbarium Carpato-Pannonicum have also been included. The grid number of locality is after NICKLFELD (1971): accordingly Kerecsend has the number 8288. The numbers of the other villages are given in the check-list. The listed species are arranged in alphabetic order. In the nomenclature and the area of the species and also the community names I followed SOÓ (1964-80). The sign of life-form was used after RAUNKIAER (1907). After the species name, the name of the author(s), the village(s), date of literature, name of collector(s), community or communities in which it was found and the date are entered. The Quercus species were identified by V. MÁTYÁS and the Rosas by G. FACSAR, both alike good specialists of these taxa. Numerous Rosa species were collected and identified by G. FACSAR and will be published here for the first time. Abbreviations of the communities: Ac.tat. Aceri tatarico-Quercetum pubescenti-roboris (hungaricum) Frax.-Ulm. Fraxineto pannonicae-Ulmetum Pol.-Carp. Polygonato (latifoliae)-Carpinetum Prun. Prunetum spinosae Robinietum Robinietum pseudo-acaciae Salv.-Fest. Salvio (nutanti-nemorosae)-Festucetum rupicolae