Zs. P. Komáromy szerk.: Studia Botanica Hungarica 14. 1980 (Budapest, 1980)
Szolláth, György: Data to the flora and vegetation of the Gerecse Mountains I.
two of the characteristic species - Phlomis tube rosa and Iris variegata - do not occur here. After dealing with forest communities we will now turn our attention to the herb communities of the examined area. Asplenio rutae-murariae - Melicetum ciliatae (Soó-Zólyomi 1951, Soó 1962) Besides the name-giving species of this community, Sedum and Sempervirum species are forming the initial herb layer of the limestone crevices. Naturally both successional borderland of the community are instanced as well; the pioneer stage composed of moss- and lichen species, and the vegetation is showing a trend towards open and closed rock-vegetation . (There were no samples taken in this community; they had been not examined in detail.),Before introducing the rock-vegetation replacing the initial plants it is important to note that the separation of the plants of limestone and dolomite was confirmed by many publications (Seregélyes 1972, Török (1977) after Zólyomi' s (1942) paper. At tha same time, they underline that the separation is not unequivocal at all - and not only in the case of rock-vegetations. Of course, we do not want to categorize at any means still further examinations seem to be necessary - mainly on the fields of mixed bed-rock - so that the vegetation should be characterized and determined more exactly. Flora of the southern side of Nagy-Gete and Magos-hegy are also Illustrative of the previous explanations; first of all regarding the two bed-rocks as well as the coexistence and the mixture of the flora on them. Caricetum humilis balatonicum (Soó 1964) (On the basis of 10 samples) Existence of rocky-grassland of slope steppe is sure but it is necessary to underline immediately that borderlands are also between the open dolomite rock-vegetation ( Festucetum glaucae hungaricum . Zólyomi 1958) and this community. Frequently can be seen that Festuca glauca (name-giving species of the open dolomite rock-vegetation) - even if it is not herb forming - occurs with a high AD value (+ - 2) while the revealing species of rocky-grassland of slope steppe are present on the same place. Among the species of open dolomite rock-vegetation it was only the Paronychia cephaloteg (on the first block of Magos-hegy) and the Euphorbia seguieriana ssp. minor (on Nagy-Gete) what we have found. Besides the previously mentioned species further ones - first of all characteristic of the rockvegetation communities - are living here, such as Minuartia setace a (+), Teucrium m on tan urn (2 3-4), Astragalus vesicarius ssp. albidus (+ - 1), Onosma visianii (+), Sempervivum hirtum (+), Fumana procumbens {+ - 3), etc. Species of most frequent occurrence characterize both communities: Carex humilis (+ - 1), Scorzonera austriaca (+), Dorycnium germanicum (+ - 1), Chrysopogon gryllus (+ - 1-2), Globularia aphvllantes (+ - +-l) x , Vinca herbacea (-*• - +-1), Helianthemum ovatum (+ 1), Seseli varium (+), etc. Cleistogeni - Festucetum rupicolae (Soó 1964) (On the basis of 5 samples) Besides the southern slopes of Magos-hegy and Nagy-Gete this community can be found on the limestone shoulders of Öreg-kő as well as on Kecske-hegy. On the examined region Festuca sulcata x According to the paper of Török (1977) this species does not grow on limestone in the Gerecse just like Fumana procumbens but this latter one grows on - petrographically pure - limestone in Kis-Kőszikla.
