L. Lőkös szerk.: Studia Botanica Hungarica 26. 1995 (Budapest, 1995)

Penksza, Károly: Flora of the Őr-hegy (Gerecse Mts, Hungary)

the associations of the area SZOLLÁT (1980) also reported floristic data on the group of hills Gete. Species occurring on the Őr-hegy and which are new for the Gerecse Mts and for the No 8377 area of the Central European Flora Catalogue were published earlier (PENKSZA 1991). Latest data are presented on the western part of the mountains by MATUS (1993). MATERIAL AND METHODS The investigated area, the Őr-hegy belongs to the hilly region between Zsámbék and Bajna in the Gerecse Mts (LÁNG 1955, BULLA 1962). Most of the hill is consisted of "Dachstein" limestone interrupted by "Hárshegy" sandstone in some places. The Őr-hegy limestone mount was asymmetrically uplifted from the upper Oligocène sandstone and clayey deposit covered by loess. The western side is higher where the limestone layers are uplifted to the surface. The eastern slope is characterized by steep dissections and is depressed under the OligoceneEocene layers.