B. Papp szerk.: Studia Botanica Hungarica 36. 2005 (Budapest, 2005)

Szollát, György; Standovár, Tibor: Botanical values of the Öreg-hegy and Juhász-halom near Csomád

assumption is also confirmed by the information collected from the Somlyó-hegy near Fót, which has similar conditions (FEKETE and KOVÁCS 1982). We could not find earlier records on the vegetation of the surveyed area. The map of the study area is shown in Figure 1. METHODS OF SURVEY Since we could not find considerable semi-natural woodland, we concentrated our efforts during the fieldwork (in 1986,1994 and 2004) on the grasslands (about 12 hectares on the Öreg-hegy and 4-5 hectares on the Juhász-halom), with special emphasis on the distribution and estimated population size of protected plants (Table 1). As a result, the species list (Table 2) is far from being complete, several common and weedy species are missing from this list, though new records on the occurrence of rare plants can never be excluded. We used the scale devised by NÉMETH and SEREGÉLYES (1989) to assess the naturalness/degradation status of vegetation. Data on species' distribution in Hungary is based on SOÓ (1964-1980) and FARKAS (1999). Phytogeographical (distribution type) and coenosystematical (phytosociological) assessment of species follows the works of SOÓ and BORHIDI published in FLÓRA database 1.2 (HORVÁTH etal. 1995), we used as reference for the nomenclature of species as well. The nomenclature for phytosociological units follows BORHIDI (2003). Nomenclature of vegetation units follows DEVILLERS etal. (2000). Fig. 1. Map of the study area.